Although only 19 years old, using his good looks and his body as a weapon, Kanzaki Nao is a natural gigolo. After being stabbed as a result of a bad breakup, he is saved by a refined and dangerous man who is a Yakuza: Murou Ryouichi, head of the Ichinose Group. Murou stops Nao from leaving the city after his wounds have healed and brings him to his apartment, offering him a deal in order to pay for Nao's treatment.

Even though Murou tells him that he's "not interested in brats", his words are contradicted when he starts kissing Nao like a lover. What will happen to Nao who swears that he definitely won't fall in love…..?