The Demonic Mercenary Turned Babysitter

Raito Yakamura lived by a code of discipline, efficiency, and control. Once a lethal mercenary, he turned his back on bloodshed to pursue a quiet civilian life. But that calm was an illusion, shattered by the urges he can no longer bury. Raito craves violence. The instincts that made him a flawless killer never left—they only grew hungrier. Enter Kurai, a cunning demon drawn to that darkness. She feeds off his violent impulses, whispering temptations and offering unnatural power in return. Strength, speed, and abilities beyond human limits and all of that in exchange for Raito being her vessel. Just when Raito begins to master the chaos within, he’s saddled with an infuriating new responsibility: babysitting. An old client vanishes, leaving behind two girls—Raika, a sarcastic, headstrong teen, and Emi, a giggling baby. To Raito, it’s a nightmare. He never asked to play house or change diapers. The only reason he’s even involved is because the girls’ sharp-eyed grandmother with dangerous connections threatened to destroy the quiet life he’s built if he refused. And Raito knows she absolutely can. So now, stuck changing diapers by day and suppressing bloodlust by night, Raito finds himself guarding two girls he never wanted to care about—all while Kurai grows stronger, feeding on his every violent impulse. He’s not doing it out of kindness. He’s doing it to survive. But survival gets complicated when emotions get involved... and monsters—both human and not—start circling. He’s not cut out for this. But that doesn’t mean he gets a choice.