After passing his university entrance exams, Haruya is ready to move out of his parents house and move in the Tokoharu Apartments. It's a win-win for him, because not only is he moving out on his own, but he gets to move into a place that's run by his long time crush, Yua. What he didn't expect what Yua's bratty sister to move in to keep an eye on him. Regardless, it seems like a pretty sweet deal, until he sees how devoted Yua is to the care of the other tenants of the apartment. Haruya thought it was all going to be so simple, but he might have fallen into a very torrid and tangled web of romance.