Yakuza Fiancé: Raise wa Tanin ga Ii

Yoshino's betrothal is far from a dream fulfilled. Her grandfather, at the helm of Kansai's largest yakuza syndicate, has arranged her marriage to Kirishima, the grandson of the Miyama Clan chief, as part of a delicate truce. To Yoshino's astonishment, Kirishima appears courteous and charming for a yakuza member; yet his warm facade conceals a dark and dangerous truth.