A high school student, Im Da-Joon is used to being bullied at school. Right before he was about to end his own life, he saw the interview of a friend killer on TV by chance. He got impressed by the interview and decided to seek revenge. His revenge was successful, but his life went in the wrong direction… Im Da-Joon quit school and joined the group of teenagers who ran away from their homes. Da-Joon is now free from school bullies, but now he has to survive against the street gangs who are much tougher than school bullies.
 
(Source: YLAB)
 
Note: Belongs to Blue String universe.

I found someone who looks exactly like me on SNS! He seems to have everything unlike me who grew up in an orphanage. Maybe he could be my twin?! When I was about to find him and solve my life problems, I got into huge trouble!!
 
(Source: YLAB)
 
Note: Belongs to Blue String universe.

Hwa-Jin Na’s teaching techniques are pretty violent for someone who works in the Ministry of Education. That being said, when punishments don't seem to work on even the worst of school bullies, there is no better man for the job. Sometimes you can’t get a good education until those bullies are taught a lesson.
 
(Source: WEBTOONS, edited)
 
Note: Belongs to Blue String universe.

Seulgi was no.1 in her old suburban school. Now, having transferred to the prestigious Chaehwa Girls’ High in Seoul, she must engage in fierce, friendly competition with her rich and talented rival Jay.
 
(Source: YLAB)
 
Note: Belongs to Blue String universe.

What happens when the scariest kid in school asks you out on a date? Yoojung struggles to survive what may just be the worst day of her life.
 
(Source: YLAB)
 
Note: Belongs to Blue String universe.

In this emotionally gripping, action-packed adventure, we trace the footsteps of Yungha Jun, a teenager who having almost lost his best friend in a brutal beatdown sets out to become the strongest teenager in the country. Through his many encounters in the ‘Young FC P.V.P’, Yungha comes to learn and embrace the true meaning of strength.
 
(Source: YLAB)
 
Note: Belongs to Blue String universe.

Note: Belongs to Blue String universe.

Nicknamed the “school for future criminals,” Yusung Technical High School isn’t exactly the ideal place to study. A rarity among his peers, Gamin is a student with just one goal: to get into university. At a school where it’s every man for himself, he is rejected from countless study groups before he decides to form his own. When Hankyeong, Gamin’s former tutor, joins his high school in hopes of earning her teacher certification, it seems like they’re both reaching for the impossible. Can they defeat the odds and achieve their dreams?
 
(Source: WEBTOONS)
 
Notes: 
- Season 1 includes 117 chapters and an epilogue. 
- Belongs to Blue String universe.

Geon-U Dan has vowed to overthrow the status quo of the dysfunctional high school he recently transferred to, where rich and powerful third-generation chaebol heirs call the shots and gambling runs rampant. But does Geon-U have what it takes to beat the odds, defeat the Taekyeong Oh Family, and restore law and order to his high school?
 
(Source: WEBTOONS, edited) 
Notes:
 - Chapter count includes a prologue.
 - Belongs to Blue String universe.

Im Da-Jun became the leader of the runaway family after being kicked out of his house. Yeon-Woo, who he took in by chance, ends up in a knife assault in Yeonsu-gu, Incheon. The one who stopped Yeon-Woo from getting his revenge against the chaebol chairman was Yun Ga-Min, whose dream is to become a good student. Meanwhile, Na Hwa-Jin takes an interest and watches over them...
 
(Source: Naver, translated)
 
Note: Belongs to Blue String universe.

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