Fuufu Ijou, Koibito Miman.

Jirou Yakuin enters his final year of high school hoping the mandatory marriage practical will pair him with Shiori, the childhood friend he has loved for years. Instead, he is matched with the bold and outgoing Akari Watanabe, while Shiori is paired with Minami, the boy Akari wants. Neither Jirou nor Akari is interested in keeping the arrangement, so they agree to act like an ideal married couple and earn enough points to reach the top ten, which may allow them to exchange partners. The trouble is that daily intimacy, forced cooperation, and unexpected jealousy make the line between their plan and genuine feelings harder to see with every passing day.