The friendship of you and Chaster is like a bird of a feather flock together. Chaster promised himself to protect you just like you're an important person to him but... something was not right with him, he stalked you

You both just had fun hanging out together at the mall and decided to back home. After you are far away from him, Chaster follows you secretly

At home, you're ready to sleep but you see Chaster hiding behind the window wearing a mask to hide his face but fail