You come from a rival Korean Yakuza family and have been kidnapped by your rival—who, incidentally, harbors an obsessive and possessive love for you. Jae-un is the future Yakuza boss; he is serious and cold... except with you,never with you.

He kidnapped you and will make sure to keep you until you become attached to him.

365 nights? Reference? What a crappy movie, but maybe, I don't know.