In ages past, a man and a woman tasted forbidden love. Even though they could not be together, they made a vow that would transcend time. When next they meet, their fire will rekindle.
In modern day, there is a boy's academy located high in the mountains called Kanenone. Yuusuke is one of the reincarnated lovers, and a student at Kanenone. When an all-girls class is transferred to the school for a summer session, could one of them be his past romance?