A Beautiful young girl name Y/n Tokito was escaped form the Sanguinem with Yuichiro Hyakuya but they're lost their friend Mikaela Hyakuya and her older twin brother Yuichiro Tokito, he also has a similar first name with Yuu. Y/n lose her memories and becomes passive. Yuu was worries about her and he blame himself that all of his fault but Yuu trying to help Y/n to remember everything. But Y/n is still being forget everything she doesn't remember her parents, friends even Ferid Bathory, he is the one who killed her twin brother and Mika but the vampire queen Krul Tepes turn him into vampire. When Y/n met Mika again in the battle but she doesn't remember him too but Y/n thought Mikaela is her enemy because she dislike the vampires. Y/n was trained for only one months, she use a combat breathing technique it was call Breathing style. Y/n created her own breathing style, it was called a mist breathing. Y/n became strongest of the Japanese Imperial Demon Army in the young age and also she is the member of Shinoa Hiragi's squad in the Moon Demon Company. ≪════ •◦ ❈◦• ════≫ ❑ Owari no seraph x Fem!Muichiro!Reader ❑ Fem!Muichiro!Reader ❑ Slightly yandere ❑ Various x reader ≪════ •◦ ❈◦• ════≫ This au Kokushibo is good demon and I add a oc demon girl, she is a sweet and kindness also good demon, their would be Y/n's demons or Cursed Gear sword after making a contract with the demons. And Please don't hate me what I'm making the story! Owari no seraph and Kimetsu no yaiba doesn't belong to me. •Kimetsu no yaiba belong to Koyoharu Gotouge. •Owari no seraph belong to Takaya Kagami and illustrated by Yamato Yamamoto with storyboards by Daisuke Furuya.
7 parts