Study Group… Think of it as a class where homework isn’t just about numbers and words; it’s about learning to fight for what you believe in, both inside and outside the classroom. Here, “study group” isn’t merely a gathering for cracking textbooks; it’s a brotherhood (and sisterhood) of misfits taking on bullies, betrayal, and even a bit of good old-fashioned justice.
TL;DR
- Ga-min fights to recruit Ji-woo and Joon into his unconventional study group.
- The group faces off against bullies and gangsters, both inside and outside of school.
- Hyun-woo’s past catches up to him, leading to dangerous consequences.
- Han-kyung’s unwavering belief in her students drives her actions.
- The study group takes a field trip, but things go awry.
- Friendship and loyalty are tested as the group faces adversity.
- The importance of standing up for what’s right is highlighted.

School is supposed to be about learning, right? Well, in this particular institution, the only lesson students seem to absorb is how to survive. But fear not! Our hero, Yoon Ga-min, isn’t about to let the educational system—or a bunch of school-sanctioned bullies—crush his dream of making it to college. No, sir. He’s on a mission, and that mission involves forming the most unconventional study group ever. But to do that, he’ll have to fight—literally—for every new member.
A Study Group That Starts with a Fight? Sounds About Right

When we last left off, Ga-min was standing awkwardly in front of a classroom full of girls. His target? Lee Ji-woo (Shin Soo-hyun). Now, Ji-woo isn’t just any student. She comes with a list of problems longer than a standardized test. Bullies? Check. A possessive creep masquerading as her boyfriend? Double check. And, oh yeah, a twin brother named Hyun-woo—who just so happens to have tried to kill their beloved teacher.

So, naturally, Ga-min does what he does best: steps in and throws hands. However, Ji-woo wasn’t even the one who applied to join the study group. That was her soft-spoken but surprisingly feisty friend, Choi Hee-won (Yoon Sang-jeong). Hee-won has a plan, and that plan involves Ga-min and Se-hyun rescuing Ji-woo from a never-ending cycle of harassment.
Debt, Blackmail, and a Little Bit of Chaos
Here’s where things get messy. Ji-woo’s twin brother, Hyun-woo, is trapped in a vicious cycle of debt, courtesy of Kim Gyu-jin (Jin Woo-jin), a local thug who thinks loaning money means owning someone’s soul. Hyun-woo was mugged one night, and instead of help, he got an “offer” from Gyu-jin: take a loan and pay it back by stealing. To make sure he complied, Gyu-jin recorded everything. Now, as long as that video exists, Hyun-woo is under his control, and Ji-woo? She’s collateral damage.
Hee-won’s request is simple (well, kind of):
- Steal the video file and destroy the evidence.
- Convince Ji-woo to join the study group so she has a support system when Hee-won transfers.
Ga-min and Se-hyun agree, but Gyu-jin isn’t about to make their lives easy. He’s part of the so-called “Discipline Committee,” which is just a fancy title for “legally protected school bullies.” And when he gets wind of their plan, he decides to release the video immediately.
Tech Heist 101: How to Steal a USB Drive and a Whole Computer

Ga-min pulls a classic “snatch and run” move, swiping the USB drive containing the incriminating footage. But Gyu-jin, ever the slimy villain, already uploaded it to his computer. Solution? Steal the whole computer.
A chase ensues, and Ga-min fumbles, sending the device flying—right into the hands of Se-hyun, who dashes to the rooftop and chucks it off the building like yesterday’s homework. Just as Gyu-jin lunges to retaliate, Ji-woo, fueled by righteous anger, delivers a knockout punch. Downstairs, Hee-won unleashes her inner warrior, tackling another bully to recover the USB drive.
Mission accomplished? Not quite.
When Revenge Goes Too Far
Just as the dust settles, Hyun-woo learns the truth: Gyu-jin was the one who mugged him in the first place. Enraged, he does what every bad decision-maker in K-dramas does—he grabs a knife. Marching into school, he attempts to stab Gyu-jin. But at the last second, Han-kyung jumps in and takes the blade instead.
While Hyun-woo collapses in shock, Han-kyung, ever the saint, tells him not to give up. Soon after, both Hyun-woo and Han-wool (the true puppet master behind all this chaos) are arrested. But Han-wool? He waltzes right out of the police station because, as it turns out, his influence goes way beyond the school walls.
One Step Closer to a Real Study Group
With Han-kyung recovering in the hospital, Ga-min’s study group finally starts to take shape. Hee-won decides not to transfer after all, meaning they just need one more member to make it official. Enter Lee Joon (Gong Do-yoo), a student with the same tragic backstory as Ga-min—except instead of wanting to master academics, he wants to master the art of street fighting.

Ga-min, being the “no-nonsense” guy that he is, slams the door in his face. Study group means studying, period. But Joon isn’t so easy to shake off. He takes an entrance test (which he obviously fails), and just when things start looking up, he gets snatched by a local gang who mistakes him for Ga-min.
Rescue Mission: Ga-min Style

What does Ga-min do? Jump out of a fourth-story window, of course. With Ji-woo and Geon-yeop backing him up, they storm the gang’s hideout. The fight is brutal, but just as it seems Ga-min might lose, he unleashes a forbidden martial arts move taught by his uncle. The result? One gangster goes flying through a stone wall.
But wait—Han-wool’s henchman shows up and tries to run them over with a car. Luckily, Se-hyun and Hee-won arrive with the police just in time. Joon is rushed to the hospital (he’ll live), and detective Na Tae-man (Shim Woo-sung) gives the kids a stern warning: next time, call the cops first.
A Surprising Twist: The Final Study Group Roster

With Joon recovering, the study group is finally complete! Han-kyung submits the paperwork, sneakily adding two unexpected names—Han-wool and Hyun-woo. She’s not giving up on them, even if they have no clue they’re now part of a study group.
A Field Trip Gone Wrong

With the group officially formed, Han-kyung arranges a visit to a prestigious school in Seoul. Compared to their own chaotic campus, this place is pristine, high-tech, and dripping with judgmental stares.
Ga-min, however, is nowhere to be seen. Why? Because Ji-woo, in a tragic typo, sent him to the wrong school. And knowing Ga-min, he’s probably striding in with full confidence, completely oblivious to the fact that he’s about to cause another misunderstanding.
More Than Just a Study Group
What makes Study Group so compelling isn’t just the action—it’s the heart. Every character carries emotional baggage, yet they all bring something unique to the table. Ji-woo’s fiery resilience, Hee-won’s unwavering loyalty, and Joon’s desperate need for guidance all add layers to this chaotic but loveable misfit squad.
As for Han-wool? He might be beyond redemption, but Han-kyung’s determination is enough to make us hope. And Ga-min? Well, in his own words, “Knowledge is stronger than a knife.” Let’s just hope no one else gets stabbed before finals week.
Stay tuned, because this study group is just getting started in this K-Drama!