After promising to marry his childhood friend, Raku Ichijou carries a locked pendant symbolizing their bond. Despite his forgotten memories, he hopes to find her again. Juggling high school dreams and yakuza responsibilities, Raku is thrust into a fake romance with Chitoge Kirisaki, the enemy's daughter, to maintain peace. As more girls connected to his pendant appear, Raku must navigate love, family feuds, and the mystery behind the key to his past.