No Ordinary Love by Kenya Wright

Sex pulsed through the Japanese brothel. It was this intense heat, vibrating through my bones and causing my nipples to stiffen under my shirt.
Don’t forget the book, Nyomi. This is work, nothing more.

Debt-ridden author, Nyomi must complete her book on Tokyo’s underground sex industry in order to revive her stalled career. But first, she needs to get permission from Kenji Soto, head of the Japanese mafia who controls the red-light district under his father’s watchful eyes. With one meeting, Kenji traps Nyomi in his gaze and locks her into a deal—spend time with him during her three-week stay, and she will earn the access she needs in order to make her book a bestseller.

But Kenji’s plans for Nyomi not only include allowing her a look around, but also a first-hand taste of the kinds of things that go on behind closed doors. And if Nyomi isn’t careful, she just might find herself falling for Kenji, a man with many demons and a passion so dark, it could change everything she thinks she knows about love.