Kuro Yami, a thirty-two year old Yakuza living in Osaka ends up agreeing to his little sisters demands, only to fall inlove with her friend at a club. Amaya Castillo, a twenty-one year old ends up meeting Kuro, but after one night, he ends up falling in love with her, until she gets kidnapped. Years later of unsuccessfully finding her, he gets into an arranged marriage, only to be with her again.