BySifr
A normal school day turns into something nobody can explain.
One by one, students begin acting strangely. A smile that lasts too long. Laughter at the wrong time. Blood where there shouldn't be any.
Then the school locks down. With no way out and fear spreading through the halls, students realize something is terribly wrong with Hwanrim High. But in a place where nobody knows who to trust anymore, surviving may be harder than finding the truth.