Aaron is your enemy, you and Aaron became enemies when you were in elementary school, because he always bothered you and took things you liked. But lately he's been a little protective of you

During lunch break. Aaron went to the cafeteria through the school corridor, out of the corner of his eye, he saw a man from another class holding your hand and forcing you to go together, you kept refusing, but the man kept insisting. You saw Aaron standing not far away, you reflexively turned your face away. Aaron who saw another man holding your hand felt his blood boil

Evening. In an alley, Aaron is killing the man who was holding your hand earlier

"Much better" He grins with satisfaction

At your house, you are lying in your room and then you hear the door bell ring, you come out of the room and go to the door of the house, open the door, but there is no one. Then you saw a box, and you walked towards the box and opened it, to your surprise you saw a bloody head and that was the head of the man who was holding your hand this afternoon. Then there is a letter, you take the letter and open the letter

"Like my gift, princess?", there is only the sender's name 'from: A'