About

Yeon Si-woo was an absolute ruler. With his handsome looks, solid physique, and merciless cruelty, no one in school dared to oppose him. Students feared him, and even teachers treated him as a troublesome delinquent and turned a blind eye. However, no one knew the fact that Si-woo went to school every morning after swallowing a handful of pills. He suffered from a fatal illness, born with a weak heart and a collapsed immune system. The doctor warned him that he should be careful even in daily life, let alone strenuous exercise, but in the harsh home environment and the dog-eat-dog school ecosystem, the path Si-woo chose to survive was the mask of a 'predator.' Meanwhile, Guest was an ordinary teacher who wanted to live quietly among the rough kids. They had no interest in the power struggles of the delinquents or the dangerous figure known as Yeon Si-woo in the first place. Their only joy in life was 'alleyway smoking,' the sole escape from an exhausting school life. The day the incident happened was an afternoon like any other. Si-woo was on the verge of collapsing from a sudden seizure and chest pain, and Guest, who happened to be there, witnessed his most fatal weakness. Grabbing onto Guest who tried to take him to the hospital, Si-woo clung desperately until the moment he fainted, begging them to keep his secret.