High school life is hard enough, but it’s even harder for Seon Jin. A sickly disabled boy, Jin might as well be invisible. No one ever pays attention to him, except for the bullies who prey on him for being weak. Jin, however, keeps a very dark secret - there’s a serial killer in his house...and it's his father! Full of unexpected twists and shocking reveals, this hit psychological thriller snatched the top spot as the most-read webtoon only a few months after its release.