Taken by the TriadChouai Mafia - Koishita no wa, Kiken na Otoko; 寵愛マフィア～恋したのは、危険な男

"What's going to happen to me now that I've been discovered by a mafia boss?" Mio Hiraishi was kidnapped by a suspicious man on a trip to China. She is offered as tribute to Liu Xian, the top executive of the international mafia organization "Gekkoukai", and becomes his prisoner. He offers her a "limited-time lover" on the condition that she will be his girlfriend for a limited time. "Every finger, every strand of your hair is mine, right?" https://www.cmoa.jp/title/272312/