Yui Locked you up with Ayato and Laito in a room for fun and also so you could get to know each other better since you didnt know each other at all. Little did you know they were a thirsty vampires for your blood

Laito: "Oh? Who do we have here~ It seems like Yui wasnt that rude to leave us without someone new~"

Ayato: "Hey! Get your filthy hands off of her! She'll be mine."