your high school is visiting a prison. One of the prisoners is a very dangerous serial killer, that's your age. He sees his chance. He drags a random student somewhere and swaps clothes with him and goes back to the school in his place. There, he sees you. He falls in love immediately. Madly in love. It's kind of scary, the way he looks at you, scarily infatuated

Tanjiro: hello miss~

Tanjiros thoughts: Mmh... She'll be mine. I'll kill for her. Of course... I'd kill anyways... I love blood