ONI: A Dark Tokyo Mafia Romance Paperback – February 22, 2026

"WEAR SILK. BRING GLOVES."SAYA I was born into a cage made of gold and blood. As the heiress to the Arashiro Consortium, my life has never been my own. In the Tokyo underworld, weakness is a death sentence, and right now, there is a massive target on my back. The rival syndicates smile at me in boardrooms, but in the shadows, they are waiting for me to fall. They want me to be a quiet, compliant symbol. They want me to break.I refuse.If I am going to survive, I need to learn how to hit back. So, I went out and found the deadliest man in the city to teach me. Kai Takeda is a monster in the ring and a ghost outside of it. The world calls him Oni—the demon. He despises my family name, and he refuses to be owned. But when my enemies try to use him as a leash to control me, they make a fatal mistake. They give the monster a reason to protect me.KAI Tokyo winter gets under your skin. I learned early that in this city, you either freeze, starve, or fight. I fought my way out of the gutters, the damp alleys, and the basement rings to become a champion. I don't take syndicate money, and I don't deal with the empire that once kept me starving on the streets. Violence is my currency, and I am an undisputed king.But Saya Arashiro isn't what I expected. She walks into my world demanding I teach her how to survive. I told her I wouldn't be her weapon. I told her to stay away before the crosshairs on her back locked onto me.But she didn't listen. And when the syndicate makes their move to rip her from her throne, I realize something dangerous: she isn't just a student anymore. She's my fight. I made a choice to stand between her and the entire underworld. And anyone who tries to touch her is going to learn exactly why they call me the devil.ONI (Blood & Gloves Book 1) is an intense, slow-burn Dark Mafia and Underground Fighter Romance filled with lethal tension, a morally gray champion, and a fierce heiress fighting for her empire. Intended for mature readers.Read it if you love:• Dark Tokyo Underworld Setting• Underground Fighter x Syndicate Heiress• "Touch Her and You Die" Energy• Forced Proximity / Bodyguard Dynamics• Morally Gray MMC & Capable FMC• High-Stakes Action & Gritty RomanceAnd if you also like:dark mafia romance booksunderground fighter romancetouch her and you die tropetokyo organized crime romancebodyguard forced proximitymorally gray romance booksslow burn romantic suspense Read more