Can a Boy-Girl Friendship Hold Up? (No, it Can't!!)

The romantic comedy center on the relationship between Himari Inuzuka and the flower-loving Yū Natsume, who swore to be friends forever during middle school. They spend their time together happily even until high school. But when Yū's first love reappears in his life, their relationship slowly becomes more chaotic, and Himari and Yū's relationship slowly turns into something else.