The Great War

Im Dajun, cast aside by his family, now leads a gang of runaways. One day, he crosses paths with a mysterious boy named Yeonwoo and brings him home—unaware of the chaos that’s about to unfold.

Soon after, Yeonwoo launches a violent rampage in Incheon, driven by a thirst for revenge against a powerful chaebol chairman. Standing in his way is Yoon Gamin, a top student with a bright future, now forced to fight in a world far beyond academics.

Meanwhile, Nahwajin of the School Authority Protection Bureau watches silently, intrigued by the gathering storm.

Set in the Blue String Universe, this action-packed crossover brings together fan-favorite characters from True Education, Study Group, and How to Fight, colliding in a brutal showdown unlike anything seen before.

This is the untold story—The Great Battle that rages behind the scenes.