The Previous Demon Kings Daughter, is Friends With A Vampires Sacrifice?!

The previous demon lord Muzan Kibutsuji, had finally been defeated by the demon slayers. not only did Tanjiro Kamado defeat him but his daughter had betrayed him as well, when he tried to take control over Tanjiros body after the final battle he was stopped by his daughter who grabbed his remaining hand that he had and instead of protesting he let her absorb his remaining power into her own body. she had almost went on another killing spree if she hadn't taken control, Tanjiro had multiple wounds on his body that she wanted to do something about it but before she could giyuu tomioka stood in front of her. he thought she'd attack him but she didn't, she lifted her hands and said that he can kill her but explained that she wanted to try and save tanjiro.

she was allowed to do so but as time went on everyone around her was growing in age while she stayed the same but with more power. soon as few more years passed and it was reaching to the modern era she had lost many emotions, but gained negative ones as well so she had decided to bring back past demons such as upper moons 6 gyutaro, upper moon 6 daki, upper moon 6 kaigaku, upper moon 4 nakime, upper moon 3 akaza, upper moon 2 douma, and lastly upper moon 1 kokushibou as well as a certain few demon slayers. they all enrolled in a Night school known as Ryoutei Academy. throughout their time there they began to take notice of a group of boys, they were known as the sakamaki siblings and a young girl by the name of yui komori.

what happens when the vampires and yui find out about lillia and the others and that they're not human either and how will the demon group find out about yui being a sacrificial bride and known as eve to the mukami brothers as well as a first blood?