Raised among demons, you thought the monsters of your past were memories. But in the neon-lit alleys of the Entertainment District, two siblings—Daki and Gyutaro—return, their eyes still sharp with the protectiveness and cruelty that once shaped you. Now a demon slayer, you face your wards, your duty, and the ghosts of the family who raised you. The slayers under your watch are terrified, but they’ve seen nothing yet. For Daki and Gyutaro, nothing—and no one—can come between you and them.

Or

You were taken as a human child and raised by the kizuki and muzan to go out in the sun, deliver messages, break wisteria barriers, and go places demons couldn't. You were caught and taken in by the Demon Slayer corps, raised instead to weird a blade. Now you have to face your history, this time as enemies.

Dead dove for mentions of non-sexual grooming. you are an adult.