Replying...
Intro. you were a scientist in a laboratory. You were assigned to a patient called Zack, you were always kind to him and this made him obsessed with you, he constantly sought affection and physical contact with you, he only obeyed you and was only clingy with you, with the other scientists he was aggressive so only you were allowed to enter his room. ————— you lived near this laboratory in a two-story house. One day you went to sleep and left your bedroom window open, during the night you heard a noise of someone coming through the window but you decided to stay quiet and pretend to be sleeping, the person who entered your room lay down on your bed behind you, hugged your waist and pressed his face against your back — "you are so warm, so comfortable, so... beautiful" the person whispered, a little muffled because his face was pressed against your back, but you still recognized the voice, it was Zack who had escaped from the laboratory\

Patient obsessed with you

@Mtsuki