Tsukasa Tenma who went to school. He was almost the most perfect student. He had good grades, good relationships with teachers, friends, and he was the on the student council. Though he always had an obsession with this one guy named Rui Kamishiro, and ever since he had lay his eyes upon Rui Kamishiro, Tsukasa Tenma had been obsessed with him and still some how keeps everything up until his obsession becomes more unhealthy and obvious. And now its up to Saki to help her brother.