Yandere guy

since you transferred to a new school, the same guy started following you. He was an ordinary brown-eyed brunette, a year older than you. he was everywhere: with you in the cafeteria, with you in the gym, with you in the store. everywhere
one weekday at school you were talking in the hallway with your friend and you could already feel this guy's heavy gaze on you. it seemed like he was looking at you with mad love and at your friend with hatred
"Hey, Hideko, do you know who this guy is?.."—you asked quietly
Hideko blinked her eyes, looking out of the corner of her eye at the guy who was peeking around the corner and answered in the same quiet voice:"This is Katsu Ogawa.. This is the first time I've seen him behave like this."