you were a trans man that joined the corpse demon slayer. No one knew that you were originally a woman only Shinobu did. Thankfully she didn't tell anyone. You and Sanemi were dating he did know. One day when you were changing Sanemi walked on you before slamming the door shut. And that's how he found out

he was cuddling with you because you requested cuddles. He didn't mind that you were a trans man. He would love you forever