Changing Majors

1. Department of Police Administration, Dongguk University

Air Date: 2022-11-11

2. Department of Thai at Hankuk University of Foreign Studies

Air Date: 2022-11-18

3. Department of Broadcasting and Entertainment, Induk University

Air Date: 2022-11-25

4. Department of Veterinary Medicine, Konkuk University

Air Date: 2022-12-02

5. Department of Psychology, Catholic University

Air Date: 2022-12-09

6. Department of Physical Therapy, Samyuk University

Air Date: 2022-12-16

7. Department of Air Service, Bucheon University

Air Date: 2022-12-23

8. Department of E-sports, Osan University

Air Date: 2022-12-30

9. Department of Physical Education, YongIn University

Air Date: 2023-01-06

10. Department of Practical Music and MT Part 1

Air Date: 2023-01-13

11. Department of Practical Music and MT Part 2

Air Date: 2023-01-20

12. Seoul National University's Broadcasting Club

Air Date: 2023-02-16

Changsub is joined by Key (from SHINee) as he reviews Seoul National University's Broadcasting Club during winter vacation.

13. Korea University's Cheerleading Club

Air Date: 2023-02-23

14. Dankook University's Stock Club

Air Date: 2023-03-02

15. Chung Ang University's Theater Club

Air Date: 2023-03-09

16. Department of Business Administration, Yonsei University

Air Date: 2023-03-23

It's the start of the first semester and Jeongwaja returns to change majors again! Lee Changsub goes to the Department of Business Administration, the largest number of departments in Korea. From marketing classes, which are the foundation of business administration, to how to be flattered at work?

17. Department of Mechanical Engineering, Busan University

Air Date: 2023-03-30

To go to the same school as Yim Siwan, Jeongwaja commutes for 10 hours! Lee Changsub learns Mechanical Engineering with a special lecture on real Busan dialect from the local and fundamentals of machine that is easily(?) learned with Legos and robots.

18. Department of Physics, Kyung Hee University

Air Date: 2023-04-06

Lee Changsub takes physics class, which is known to be a class that only real fans of science take! Starting with Interstellar's quantum mechanics and even an experiment that can win the Nobel Prize(?), Ant-Man, Doctor Strange...is it possible in real life?

19. Department of Beauty Art, Seokyeong Unviersity

Air Date: 2023-04-13

From shampooing to drying and cutting, Lee Changsub goes to the Division of Beauty Art and experiences a full course at a hair salon by majoring in Hair Design!

20. Department of Architecture, Soongsil University

Air Date: 2023-04-24

Lee Changsub takes a class in the Department of Architecture that says staying up all night is basic! Taking a class at a construction site blowing cement powder and a design class where the professor buys chicken, Jeongwaja finally finds his talent?

21. Department of Media Communication, Sungkyunkwan University

Air Date: 2023-04-27

From storytelling to nonverbal communication method, Lee Changsub learns everything by visiting Media Communication, a popular liberal arts department! With a surprise appearance of colleagues at work, Jeongwaja goes back to his main job?

22. Department of Companion Animal Health, Yeonsung University

Air Date: 2023-05-04

Lee Changsub goes to the Department of Companion Animal Health where he took classes with Shiba (not swearing)! From making pet food that even people covet to pet training tips that surpass Kang Hyung-wook, how will Jeongwaja (aka Guri's daddy)'s adaptation period to the Department of Companion Animal Health be?

23. Department of Nursing, Ajou University

Air Date: 2023-05-11

From the mystery of the birth of life to urgent real emergency room case practice, Lee Changsub learns in Ajou University's Department of Nursing! How does one respond to an emergency room patient? Jeongwaja shows us how!

24. Department of Fashion Design, Hansung University

Air Date: 2023-05-25

Jeongwaja goes to Hansung University's Department of Fashion Design to become a fashion leader of the new generation! Lee Changsub tries to make clothes himself and even does the fitting! Let's check his fashion sense!

25. Department of Hotel Culinary Arts, Korea Hotel & Tourism Technical College

Air Date: 2023-06-01

Lee Changsub goes to the Department of Hotel Culinary Arts and tastes heavenly food! A Jeongwaja who receives a special secret from Professor Lee Yeon-bok and Professor Jung Ho-young is reborn as a Cooking Master Boy, in one day?

26. Military Academy #3

Air Date: 2023-06-08

"Jeongwaja has been ordered to be re-enlisted..!🪖” Jeongwaja ended up re-enlisting in the army to carry out the promise he made for reaching the 🔥500k subscribers🔥 milestone

27. Hanyang University Division of Materials Science and Engineering

Air Date: 2023-06-15

28. Department of Urban Administration, University of Seoul

Air Date: 2023-06-22

29. Division of Navigation Science, Korea Maritime and Ocean University

Air Date: 2023-06-29

30. Department of Early Childhood Education, Kyungin Women's University

Air Date: 2023-07-06

31. University Work Program for Rural Areas, Kookmin University

Air Date: 2023-07-13

32. The reason they give up math? (feat. People who give up math) [Sogang University Math Department]

Air Date: 2023-09-21

33. South Korea's Top Fine Arts College [Hongik University Department of Painting]

Air Date: 2023-09-25

34. A degree worth a shot [Kyunghee University Korean Medicine Department]

Air Date: 2023-09-28

35. Never lose an argument again [Philosophy, Korea University]

Air Date: 2023-10-05

36. Major packed with horses [Univ of Agriculture&Fisheries Horse Industry Major]

Air Date: 2023-10-19

37. A Must-Visit Course Before the Air Force [Hanseo University Helicopter Operations]

Air Date: 2023-10-26

38. Re-enrollment, Let's go to Howon University Department of Practical Music

Air Date: 2023-11-02

39. Top level universities worldwide (feat.1million subscriber pledge) [Overseas Univ]

Air Date: 2023-11-09

40. Korean Studies without Koreans [The University of Hong Kong, Korean Studies]

Air Date: 2023-11-16

41. Finally, Jeongwaja in court [Kookmin College of Law]

Air Date: 2023-11-23

42. Reservation Tips from future hoteliers [Sejong Univ. Hotel and Tourism Management]

Air Date: 2023-11-30

43. Ways to put out the fire from firefighter [Fire and Safe Management at Kyungmin Univ]

Air Date: 2023-12-07

44. The Top-tier level in Engineering, KAIST [KAIST Aerospace Engineering]

Air Date: 2023-12-14

45. Professor Shares A Hangover Remedy [Inha University Department of Biotechnology]

Air Date: 2023-12-28

46. Hanyang University ERICA Department of Dance and Arts

Air Date: 2024-01-04

47. Professor, do you really not notice people ducking out?

Air Date: 2024-01-11

48. MZ Orientations (OT) nowadays;; [Ajou University Department of Pharmacy]

Air Date: 2024-03-28

49. Broke the Microphone at the Vocal Department [Hanyang University Vocal Music Dept]

Air Date: 2024-04-04

50. What color do you like? [Chung-Ang University Department of Political Science]

Air Date: 2024-04-11

51. I'm an Ewha University Boy [Ewha Womans University Department of Ceramic Arts]

Air Date: 2024-04-18

52. Department for nuclear-level geniuses only [SNU Department of Nuclear Engineering]

Air Date: 2024-04-25

53. Jeongwaja goes to a prestigious university in Japan [Osaka University]

Air Date: 2024-05-02

54. Working part-time in Japan and setting people up together [Part-time/USJ]

Air Date: 2024-05-09

55. Department that eats airline food for lunch [KAU Department of Drones]

Air Date: 2024-05-16

56. Teacher, how are babies made? [Seoul Nat'l University of Education]

Air Date: 2024-05-23

57. Department where they become Webtoon writer [Yonsung Univ. Webtoon Contents Dept.]

Air Date: 2024-05-30

58. Mom VS Girlfriend drowning in water, what's your choice? [PKNU Marine Sports Dept]

Air Date: 2024-06-06

Pukyung National University Marine Sports Department

59. How to choose the toothpaste according to the Department of DH [Gachon Univ. DH Dept]

Air Date: 2024-06-13

Gachon University Dental Hygiene Department

60. #1 University that Jeongwaja should avoid [Police University]

Air Date: 2024-06-20

61. The military train will be departing[Woosong Univ. Dept of Railway Vehicle System]

Air Date: 2024-06-27

Woosong University’s Railway Logistics College

62. Finally Re-re-enlisting in the Military [Air Force Academy]

Air Date: 2024-07-04

63. It's Not Over Until It's Over [Incheon Nat'l University Summer Semester]

Air Date: 2024-07-11

64. Which Department Reigns Supreme in Korea? [Union MT Part 1]

Air Date: 2024-08-22

65. Which University is the Best in Korea? [Union MT Part 2]

Air Date: 2024-08-29

66. Jeongwaja Acting? Surprised, Right? [Kyung Hee University Theater and Film Department]

Air Date: 2024-09-26

67. The department where "Shi-X" means "sorry" [HUFS Arabic Department]

Air Date: 2024-10-03

68. Bread Unnie, Kim Yeon-koung, is a freshman here at [KNOU Department of Sports for All]

Air Date: 2024-10-10

69. Most Heartbreaking Fairy Tale [Danguk University Creative Writing Department]

Air Date: 2024-10-17

70. POSTECH vs KAIST Showdown Stories [POSTECH Computer Science Department]

Air Date: 2024-10-24

71. Legendary ER Stories Unveiled [Eulji University Paramedic Department]

Air Date: 2024-11-07

72. The Day Before the CSAT [SeoulTech Visual Communication Design Department]

Air Date: 2024-11-14

73. Get service at a mala tang restaurant [Myongji Chinese Language and Literature]

Air Date: 2024-11-21

74. Perfect shot tips from Modeling Dept. [Seokyeong Univ's Modeling & Acting Major]

Air Date: 2024-11-28

75. How Much Do Music Students' Instruments Cost? [Chugye University for the Arts]

Air Date: 2024-12-05

76. The Truth About Jeju Uni's Tangerine Packaging Department [Tourism Management]

Air Date: 2024-12-12

77. Why take medicine 30 minutes after a meal? [AJOU UNIVERSITY College of Pharmacy]

Air Date: 2024-12-19

78. Came to build a ship [MNU Naval Architecture And Ocean Engineering]

Air Date: 2024-12-26

79. How to get 1 million won a year [Chung-Ang University Social Welfare Department]

Air Date: 2025-01-05

80. Dentist Tips from a Dental Student [SNU Graduate School of Dentistry]

Air Date: 2025-01-08

81. Episode 81

Air Date:

82. Episode 82

Air Date:

83. Episode 83

Air Date:

12. Seoul National University's Broadcasting Club

Air Date: 2023-02-16

Changsub is joined by Key (from SHINee) as he reviews Seoul National University's Broadcasting Club during winter vacation.

13. Korea University's Cheerleading Club

Air Date: 2023-02-23

14. Dankook University's Stock Club

Air Date: 2023-03-02

15. Chung Ang University's Theater Club

Air Date: 2023-03-09

16. Department of Business Administration, Yonsei University

Air Date: 2023-03-23

17. Department of Mechanical Engineering, Busan University

Air Date: 2023-03-30

18. Department of Physics, Kyung Hee University

Air Date: 2023-04-06

19. Department of Beauty Art, Seokyeong Unviersity

Air Date: 2023-04-13

20. Department of Architecture, Soongsil University

Air Date: 2023-04-20

21. Department of Media Communication, Sungkyunkwan University

Air Date: 2023-04-27

22. Department of Companion Animal Health, Yeonsung University

Air Date: 2023-05-04

23. Department of Nursing, Ajou University

Air Date: 2023-05-11

24. Department of Fashion Design, Hansung University

Air Date: 2023-05-25

25. Department of Hotel Culinary Arts, Korea Hotel & Tourism Technical College

Air Date: 2023-06-01

26. Military Academy #3

Air Date: 2023-06-08

27. Hanyang University Division of Materials Science and Engineering

Air Date: 2023-06-15

28. Department of Urban Administration, University of Seoul

Air Date: 2023-06-22

29. Division of Navigation Science, Korea Maritime and Ocean University

Air Date: 2023-06-29

81. How a KAIST student Eats Yeoptteok without hurting his tongue [KAIST Dept. of Chem]

Air Date: 2025-03-27

The long-awaited first episode of JeonKAIja is all about… Chemistry! 🧪🧑‍🔬 From wild science experiments that scream “mad scientist” to the first-ever department room raid in Jeongwaja history! With high hopes, JeongKAIja heads to the very first campus! But… did he actually understand the KAIST lecture? 🤔

82. Boxing vs. Ssireum – Who Wins? [Yongin University Martial Arts]

Air Date: 2025-04-03

"Hey, you feeling confident?" We visited the Martial Arts Department at Yongin University! From real sparring with a boxing athlete to intense ssireum matches with muscular opponents! In the end, KAI got knocked out… And after just two shoots, did KAI grab the PD by the collar?! 👊

83. US VS UK, Complete Analysis of English Pronunciation Differences [Sogang University English Language and Literature Department]

Air Date: 2025-04-10

How are you? I'm fine thank you. And you? Went to Sogang University Department of English Literature! Do English Literature majors learn this too?! From analyzing Harry Potter to free-talking with a native English speaker!

84. How much do you earn if you join ROTC?

Air Date: 2025-04-17

Salute!🫡 JeonKAIja, reporting for duty at ROTC! From physical training with ROTC cadets to an impromptu meeting with ZE:A Dong Jun!

85. The First Ever Fish Dissection on Korean Variety Show [Jeju National University – Department of Aquatic Life Medicine]

Air Date: 2025-04-24

KAI, the second major changer, visited Jeju University’s Department of Aquatic Life Medicine. Thanks to the Department of Aquatic Life Medicine who allows us to have No. 1 snacks for alcohol, olive flounder. Nation’s first variety show to fish dissection and local’s pro tips on Jeju!

86. Why Meat Tastes Better Than Vegetables [Sangmyung University – Department of Food & Nutrition]

Air Date: 2025-05-01

There's a university in Seoul that even Jeongwaja's never visited yet? We went to Sangmyung University Food and Nutrition Department! From a surprisingly delicious toast recipe to anti-aging tips directly from a professor!

87. Jeongwaja Announces Candidacy (feat. aespa) [Hongik Uni. Student Council]

Air Date: 2025-05-08

Jeongwaja returns with a second special episode! This time, he visits the student council! 💫 The highlight of student council work? The university festival! KAI takes on the mission of inviting aespa himself! Will he succeed...?

88. Conan & Luffy as professors? [Voice Acting Dept. at KBAS]

Air Date: 2025-05-22

By chance, in my childhood~🎶 Visited the Voice Acting Dept. Korean Broadcasting Art School! From top-tier anime dubbing like Teenieping to meeting the legendary voice actors behind Conan and Luffy! Live reveal of the voices from your childhood✨

89. Every Teacher Ever) Your Class is The Slowest! [Hanyang University College of Education]

Air Date: 2025-05-29

Jeongwaja, let's go to school! This time we went to Hanyang University's College of Education! From a 8th grade class demonstration to making your own textbook! A trip down memory lane.

90. Jeongwaja Takes on Baking 🍞 [Hotel Baking & Pastry, Korea Tourism College]

Air Date: 2025-06-05

Jeongwaja Finally Hits the Bread Scene 🥖 Today, we visited the Hotel Baking & Pastry Department at Korea Tourism College! From one-of-a-kind artisan loaves made with a Master's top-tier recipe to a chocolate workshop bursting with sweetness 🍫 Bread-spoon KAI's hands-on baking adventure ✨

91. Why You're Not Getting Texts from Your Crush [Yonsei EE]

Air Date: 2025-06-12

Pikachu! 1 million volts! Today, we visited Yonsei's Department of Electrical and Electronic Engineering! From buzzing beginner analog labs to hidden electronic theories in real-life applications! A thrilling engineering deep dive by JeonKAIja, the engineering student!

92. Becoming King Sejong [Korea Univ. Dept. of Korean Language & Literature]

Air Date: 2025-06-19

The language of our nation differs from that of China🤴🇰🇷 This time, we visited Korea University’s Department of Korean Language and Literature! From classes that dig deep into phonology to emotionally rich lectures on modern poetry! And so, KAI became a literary boy📚