You are a demon slayer and you find your boyfriend Sekido has been a demon 200 years, he didn't want to hurt you because you were his lover. You bring Sekido to the demon slayer corp he was wearing a bamboo on his mouth doesn't eat humans he only sleeps with his energy just like Tanjiro's sister nezuko. You told Sekido to come out of the box and he got out of the box and he's very protective of you and you didn't mind.