Changing Majors

Nov 11, 2022

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Feb 16, 2023

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

Feb 23, 2023

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Mar 9, 2023

Mar 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?

Mar 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.

Apr 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?

Apr 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!

Apr 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?

Apr 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?

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?

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!

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!

Jun 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?

Jun 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

Jun 15, 2023

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Pukyung National University Marine Sports Department

Jun 13, 2024

Gachon University Dental Hygiene Department

Jun 20, 2024

Jun 27, 2024

Woosong University’s Railway Logistics College

Jul 4, 2024

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Jan 5, 2025

Jan 8, 2025

Feb 16, 2023

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

Feb 23, 2023

Mar 2, 2023

Mar 9, 2023

Mar 23, 2023

Mar 30, 2023

Apr 6, 2023

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Mar 27, 2025

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? 🤔

Apr 3, 2025

"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?! 👊

Apr 10, 2025

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!

Apr 17, 2025

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

Apr 24, 2025

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!

May 1, 2025

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!

May 8, 2025

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...?

May 22, 2025

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✨

May 29, 2025

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.

Jun 5, 2025

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 ✨

Jun 12, 2025

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!

Jun 19, 2025

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📚

Jun 26, 2025

Which major should we try today? Take a guess! For the first time ever, Jeongwaja visits the Division of Liberal Studies! Today, everything’s free and flexible. The university is free, the major is free, even the classes are free?! So, which department will our Jeongwaja end up in…?

Jul 3, 2025

The long-awaited ballet episode is here, Snackie! From a deep dive into ballet terminology to hands-on practice with the classic Swan Lake! Will KAIja nail the ballet—or tear something else?

Jul 24, 2025

Jeongwaja back with summer break, part 1 at SNU Insect Club! 🦟 From spine-chilling insect mukbangs to full-on summer break vibes with bug catching! And, to enjoy the break the special guest, TEN, is invited?!👀

Jul 31, 2025

This is the second lesson! Part Two of the summer break special, Senior University! From anti-aging secrets and the low-intensity health dance to heartwarming creative writing classes! Plus, the perfect guest for Senior University: Lee Myeonghwa, RALRAL’s alter ego!

Aug 7, 2025

Salute! 🫡 JeonKAIja X JANG WONYOUNG ordered to a boot camp experience at the Military Science Department! It's 🍀Lucky Vicky JANG WONYOUNG🍀 and 👿Unlucky JeonKAIja 👿 enlisting together From the legendary Number 8 PT whole body twisting to the three-line crossing under the blazing sun? (@: Why is the bunny princess trying this hard...) JANG WONYOUNG takes a hard hit to the instep and in the end, Lucky Vicky missing in action?💔

Aug 13, 2025

End of summer break, start of the semester JeonKAIja is finally back! The true start of the semester is none other than the 0.1-second battle: Course Registration. From never-before-seen course registration tips to lightning-fast clicking skills that could outwin even Faker! Will JeonKAIja be able to avoid taking a break from school…?

Sep 25, 2025

Hello, I’m here as the stand-in today~ Taking the place of Jeongwaja, who escaped to the U.S., it's ??? here! 🔥 Kicking off Jeongwaja this time is the Department of Aviation Management, training future ground staff! ✈️ From super useful airplane tips to hands-on check-in practice straight from the airport! What kind of chaotic campus life awaits our stand-in today..? 😎

Oct 2, 2025

JeonKAIja back after a long time🎉 First department of the second semester is Classical Chinese Department! "Eochapi" as in "Anyway" was Hanja characters? From surprising Hanja characters😱 to dizzy old myths🤯 Will JeonKAIja conquer Hanja?

Oct 16, 2025

🎉Time to celebrate! 100th episode of Jeongwaja!🥳 We have CHANGSUB, our returning student! Former Jeongwaja X JeonKAIja collaboration! These two revisit the Police Administration Major, the place where it all started!👮‍♀️ Bromance blossoms amidst gossiping about the Jeongwaja production team and they take corrections classes: hope it sets these two straight! A total of 100 episodes between CHANGSUB X KAI Curious about their chemistry?

Oct 23, 2025

Part 2 of the 100th episode!🥳 What JeonKAIja and Former Jeongwaja have been waiting for all this time!💕 From From a heart-fluttering first impressions to dopamine-filled drinking games! 😘 Will their love be able to blossom amidst this tangled web of fate…?

Oct 30, 2025

JeonKAIja visits an art college for the first time! And here comes freshman DO KYUNG SOO?! From mind-breaking theory classes to fiery metal sculpture practice 🔥 The two get completely lost in the heat of metalwork! Looks like their friendship might crack too... 😱

Nov 6, 2025

Who hasn't gotten a health checkup yet?✋ This time, we visited Kyungbok University's Clinical Laboratory Science Department! From a blood-curdling dissection lab you've never seen before✂️ to a blood-draw practice that pricks💉 In a blood-bath of a class, JeonKAIja's mind is shaken😱 Will he survive the day?

Nov 13, 2025

Today, JeonKAIja visits the Japanese Language and Literature Department at Kyonggi University! From ordering food in Japanese🍜 to deep-diving into otaku culture!📺 JeonKAIja gets overwhelmed by the next-level otaku power🤣 Will he survive the overflow of Japanese...?

Nov 20, 2025

A major where you drink every day? Join ITZY’s CHAERYEONG🦊 as she dives into Hotel Food & Beverage Management! From hands-on beverage training where drinking is totally legal 🍸 to real hotel banquet service with actual guests🔥 A chaotic collaboration between booze-expert CHAERYEONG and booze-clueless JeonKAIja! Will they survive the class without losing their minds? 😵‍💫

Nov 27, 2025

Finally, Jeongwaja Blind Date has returned💕 Enemies meet up in a blind date?! YeonKo, I mean, KoYeon blind date is here🥳 With an intense Jenga game and a fluttering whisper game!😘 Flirting between Yonsei Eagles🦅 and Korea Tigers🐯 and someone took all the votes?!😱 Is this blind date… gonna be ok…?

Dec 4, 2025

What an advertisement and public relations! 🕺 The ultimate PPL addict, JeonKAIja! Today, we're visiting Chung-Ang University's Department of Advertising & Public Relations! From unique ways to measure creativity 📺 to hands-on ad classes where the model experience kicks in! JeonKAIja's mental breakdown under a surprise assignment 😵‍💫 Will he survive the class without losing it...?

Dec 11, 2025

A rough mind, anxious eyes…😎 Meet JeonKAIja, an IQ 138 brain-gical mind!🧠 Today, he visited DGIST’s Department of Brain Science! From a dopamine-bursting brain lecture to a hilarious encounter with Special Professor Orbit?!😂 A science talk that never ends… 👩‍🔬👨‍🔬 Will he survive among these hardcore brain nerds..? A campus culture revival project packed with relatability, info, and nostalgia.

Dec 18, 2025

Even at year's end, Jeongwaja Blind Date is still open for business 💘 "What's the basis of you liking me?" A STEM guy who breaks love down like a formula meets, "If you like someone, do you really need a reason?" A liberal arts girl who wants to trust her heart first! 😘 Drawn to each other's opposite charms like the N and S poles, the former blind-date pair reunites like it’s destiny?! 😱 So how will this group blind date end...?

Jan 8, 2026

Jeongwadate continues into the new year 🌅💛 This time, Jeongwadate goes global 🌐 Love knows no borders! International students from all around the world, and flirty moments inspired by every culture ❤️‍🔥 Different languages, same butterflies 👉🏻👈🏻 So, how will this global Jeongwadate turn out? 📚 Changing Majors, Jeongwaja 📚 New episodes every Thursday at 6 p.m. 📍 Location sponsored by: #Tokyo Market, Sillim Branch

Jan 22, 2026

weeter than Dubai Chewy Cookie 🧆 Hotter than Single's Inferno Jeongwaja Blind Date is back🔥 A Music Dept x Physical Ed Dept blind date curated by EXO's SEHUN 💕 Rhythm-filled music majors meet physique-maxed physical ed majors Blind date veterans vs first-timers Watch the sparks fly! Even dating-show rookie SEHUN ends up falling for Jeongwaja Blind Date 👑 The king is back. Please show lots of love for EXO's comeback 👑

Jan 29, 2026

Feeling extra fluttery today, Snackies 💗 Your heart’s getting a serious workout today 💪 This one’s going to stay on your mind before bed Cold brains, hot romance Legendary chemistry between SNU and KAIST students. Even the first-ever outdoor date at Jeongwa-ting? An engineering blind date with chemistry off the charts The vibe today is way too 🤙 good 👍 How many couples will be born today?