Synopsis

Mizuto Irido and Yume Ayai were nerdy bookworms who seemed perfect for each other—until they weren't. They dated briefly but drifted apart after middle school and went their separate ways. Then life throws them a curveball: their parents get together, making them step-siblings. Neither wants to accept the other as the "older" sibling, so tension builds pretty quickly. To settle things, they make a deal: whoever acts inappropriately for step-siblings first loses. The winner gets to be called the older one and can make any request they want. But living together stirs up old memories. As they're constantly around each other, those buried feelings start creeping back in—and it becomes increasingly clear that what they had might not be as dead as they thought.

Content compiled by AnimeList.moe from publicly available sources.

Genres