Nisekoi

Raku Ichijou wants nothing more than an ordinary high-school life, despite being heir to a yakuza family. He still treasures a locked pendant from a promise made ten years earlier and quietly likes his classmate Kosaki Onodera, until a gang conflict forces him into a fake romance with the one girl he cannot stand: Chitoge Kirisaki.

Chitoge is the daughter of a rival gang boss, so the two must convince everyone that they are deeply in love to keep their families from fighting. Their daily arguments become harder to manage when Raku learns that more than one girl may be connected to the promise from his childhood. Between false affection and genuine feelings, finding the owner of the key grows increasingly complicated.