If 15-year-old Kazuya Hasukawa's stomach wasn't perforated in a car accident, it would have been perforated by an ulcer! The woman he loves just married his older brother, and worse, he is bringing her home to live with them! Kazuya has no choice; he has to leave, and the only option is to enter the exclusive all-male boarding school, Ryokuto Academy. But since the car accident sidelined Kazuya for quite some time, and he ended up missing a little over a month of school! Entering school, Kazuya is introduced to the Student Body President, Shinobu Tezuka, and Kazuya's dorm's Head Resident, Mitsuru Ikeda, who both seem like nice, good-looking young men. They escort Kazuya to his new home, the dorm named Ryokurin-ryû--but because that is so difficult to pronounce, they call it by its English translation, Greenwood. And because Kazuya arrived at school late, he is introduced to his new roommate in the last available room, Shun Kisaragi, the cutest girl in the guy's dorm!