Raku is the heir to a yakuza family. He is highly skilled at rough work and cooking, which he often does so for his yakuza clan. He made a promise to a girl ten years ago to marry her once they reunite and received a pendant from her. Even though he has no memory of the girl’s name or how she looks like, he hopes to reunite with her and fulfill his promise. He is forced to date Chitoge, who is the daughter for another clan.