Kazuya is an orphan. He was raised by his older brother, Kazuhiro, who attended Ryokuto academy. Hasukawa idolized his brother and wanted to enroll at Ryokuto to be more like him. At the start of the series, we see him enrolling into the school, realizing his dream, but he is very late due to a series of freak accidents. To make matters worse, Kazuhiro has just married Kazuya's first love, Sumire! Unable to live in the same house as the newly-weds, Kazuya moves into the dorms. Little does he know what terrors await him there!

(Source: Wikipedia)