1x1 - Department of Police Administration, Dongguk University

November 11, 2022

1x2 - Department of Thai at Hankuk University of Foreign Studies

November 18, 2022

1x3 - Department of Broadcasting and Entertainment, Induk University

November 25, 2022

1x4 - Department of Veterinary Medicine, Konkuk University

December 2, 2022

1x6 - Department of Physical Therapy, Samyuk University

December 16, 2022

1x7 - Department of Air Service, Bucheon University

December 23, 2022

1x8 - Department of E-sports, Osan University

December 30, 2022

1x9 - Department of Physical Education, YongIn University

January 6, 2023

1x10 - Department of Practical Music and MT Part 1

January 13, 2023

1x11 - Department of Practical Music and MT Part 2

January 20, 2023

1x12 - Seoul National University's Broadcasting Club

February 16, 2023

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

1x13 - Korea University's Cheerleading Club

February 23, 2023

1x14 - Dankook University's Stock Club

March 2, 2023

1x15 - Chung Ang University's Theater Club

March 9, 2023

1x16 - Department of Business Administration, Yonsei University

March 23, 2023

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?

1x17 - Department of Mechanical Engineering, Busan University

March 30, 2023

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.

1x18 - Department of Physics, Kyung Hee University

April 6, 2023

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?

1x19 - Department of Beauty Art, Seokyeong Unviersity

April 13, 2023

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!

1x20 - Department of Architecture, Soongsil University

April 24, 2023

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?

1x21 - Department of Media Communication, Sungkyunkwan University

April 27, 2023

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?

1x22 - Department of Companion Animal Health, Yeonsung University

May 4, 2023

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?

1x23 - Department of Nursing, Ajou University

May 11, 2023

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!

1x24 - Department of Fashion Design, Hansung University

May 25, 2023

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!

1x25 - Department of Hotel Culinary Arts, Korea Hotel & Tourism Technical College

June 1, 2023

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?

1x26 - Military Academy #3

June 8, 2023

"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

1x27 - Hanyang University Division of Materials Science and Engineering

June 15, 2023

1x28 - Department of Urban Administration, University of Seoul

June 22, 2023

1x29 - Division of Navigation Science, Korea Maritime and Ocean University

June 29, 2023

1x30 - Department of Early Childhood Education, Kyungin Women's University

July 6, 2023

1x31 - University Work Program for Rural Areas, Kookmin University

July 13, 2023

1x32 - The reason they give up math? (feat. People who give up math) [Sogang University Math Department]

September 21, 2023

1x33 - South Korea's Top Fine Arts College [Hongik University Department of Painting]

September 25, 2023

1x34 - A degree worth a shot [Kyunghee University Korean Medicine Department]

September 28, 2023

1x35 - Never lose an argument again [Philosophy, Korea University]

October 5, 2023

1x36 - Major packed with horses [Univ of Agriculture&Fisheries Horse Industry Major]

October 19, 2023

1x37 - A Must-Visit Course Before the Air Force [Hanseo University Helicopter Operations]

October 26, 2023

1x38 - Re-enrollment, Let's go to Howon University Department of Practical Music

November 2, 2023

1x39 - Top level universities worldwide (feat.1million subscriber pledge) [Overseas Univ]

November 9, 2023

1x40 - Korean Studies without Koreans [The University of Hong Kong, Korean Studies]

November 16, 2023

1x41 - Finally, Jeongwaja in court [Kookmin College of Law]

November 23, 2023

1x42 - Reservation Tips from future hoteliers [Sejong Univ. Hotel and Tourism Management]

November 30, 2023

1x43 - Ways to put out the fire from firefighter [Fire and Safe Management at Kyungmin Univ]

December 7, 2023

1x44 - The Top-tier level in Engineering, KAIST [KAIST Aerospace Engineering]

December 14, 2023

1x45 - Professor Shares A Hangover Remedy [Inha University Department of Biotechnology]

December 28, 2023

1x46 - Hanyang University ERICA Department of Dance and Arts

January 4, 2024

1x47 - Professor, do you really not notice people ducking out?

January 11, 2024

1x48 - MZ Orientations (OT) nowadays;; [Ajou University Department of Pharmacy]

March 28, 2024

1x49 - Broke the Microphone at the Vocal Department [Hanyang University Vocal Music Dept]

April 4, 2024

1x50 - What color do you like? [Chung-Ang University Department of Political Science]

April 11, 2024

1x51 - I'm an Ewha University Boy [Ewha Womans University Department of Ceramic Arts]

April 18, 2024

1x52 - Department for nuclear-level geniuses only [SNU Department of Nuclear Engineering]

April 25, 2024

1x53 - Jeongwaja goes to a prestigious university in Japan [Osaka University]

May 2, 2024

1x54 - Working part-time in Japan and setting people up together [Part-time/USJ]

May 9, 2024

1x55 - Department that eats airline food for lunch [KAU Department of Drones]

May 16, 2024