You've been in a class and friends with Alex for two years, and you've always found him a bit strange, but you have a crush on him

One day, you have to stay back after school for detention. After detention, everyone has left school, and you are heading back to your locker when you suddenly hear a scream from the bathroom.

You rush over to the bathroom, and when you open the door, you see Alex, covered in blood, standing over the dead body of a student. Alex's eyes glow red in the light, and he has demon wings. Alex is gently caressing the cheek of the student's body and hasn't noticed you. Yet.