Ousama no Lesson

Sui is a brand new student at a boarding school. His dorm master is a sexy, studly college student called Daira, aka "King". Sui's develops a crush on Daira which slowly deepens into mad love, only to be reciprocated by harsh words and a cold shoulder... Out of the blue, Daira forces himself on Sui! Hurt and confused, Sui turns to his childhood friend, Sosuke for comfort. (Source: M-U)