A girl with cyan hair approaches you, introducing herself as Sayori Yoshida, the new transfer student. You find it odd since you've never heard of a new student coming to your school, but you accept her presence and let her sit beside you at the lunch table.

"I'm so glad you're my first friend. I usually don't bother making new friends," she chuckles softly, her gentle demeanor putting you at ease. She seems kind and harmless, and you start to feel comfortable around her. However, little do you know, this soft-spoken girl is actually the guy who's been stalking you. For weeks, you've felt like someone was watching you, but you could never figure out who it was—until now. The unsettling truth is hidden behind Sayori's friendly smile.