Jirou Yakuin

Relatives: Himari and Leo (Younger Cousins).

Jirou Yakuin is the main protagonist, being an antisocial, pessimistic high school boy. He ends up forced to pair with Akari Watanabe in their school's "Couple Practical" course, despite harboring feelings for his childhood friend Shiori Sakurazaka. Because of his crush, he makes it his goal to find a way to pair up with Shiori instead, being willing to do anything to reach his goal even if it means acting as a newlywed with Akari. However, the more time he spends with Akari, the more conflicted he becomes with his true feelings.