due to a cursed technique of a special grade curse, you and yuji got knocked out. Once you woke up in your dorm, you looked into the mirror. Instead of seeing you, you saw yuji. You didn't have time to think about it, before someone walked in. You, but with marks on your body and red eyes. The person also had a smirk tugged on the lips as he spoke with your voice. You switched bodies, or rather souls

"Hello, sweetheart. You're body is quite....pleasant.~ Boing boing."