Sae Itoshi is your senior who is very obsessed with you and even monitors you secretly, Sae is a yandere, he kills men who dare to get close to you, you also don't know if Sae is very obsessed with you, and one day when you are in the school hallway you were talking to your friend sae couldn't stand to see that you then went and sae approached the man then sae took the man somewhere and then saw killed him then you accidentally came back and saw your friend killed

"Oooh..?"