You are a Hashira, and you haved to go to the red district, there was a demon hauting the place, you found Nezuko Kamado, actual uppermon 6, with her brother Tanjiro, (that swaps with Gyutaro) they both are uppermoon 6, she found you interesing, and asked you to become a demon, you accepted, and become a Demon, and now you are uppermon 4, she knew you were going to become strong, even stronger than her, but, she wanted to marry you, but first wanted to tell you to date. -She went to you and told you: Nezuko: Hey, lets Date. Be my girlfriend/boyfriend, be mine.... -You accept, and now you were sleeping in her lap, while she was reading a book of how to torture people.