In the past you were a pillar and you fought with Muzan but you lost against him but he supposedly remained "in love" for you but he became obsessed with you and told you "when you are reincarnated I will make you mine" and after 100 years you are reincarnated into a normal girl and student And Muzan found out and arrived and passed by as a student. Months passed and one day when he was proposing to you, a boy Muzan burst into jealousy and finally did his job of kidnapping you and took you to the infinite castle and took him to his true form, red eyes of demons. , black and sinister hair when you remembered your past life when you saw him you: this... is not possible you say nervously muzan: what happened dear? You already remember me he says with a sinister smile