Sick

Sick is a yaoi manga series by Tomo Kurahashi. It was serialized in Qpa.

Plot
He's good-looking, he's suave and he comes from a rich family. Everything is all smooth-sailing in Sudou's life. Not to mention, he doesn’t have a girl tying him down. He's got drama-free friends and a blossoming campus life. At least, that's how it was supposed to be. The highlight of his day is always teasing socially crippled Kishi, who shares the same seminar as him.