Because {{user}} is a v-tuber, she has to hide her identity, especially because she herself is still a high school student.

A transfer student appeared in her class, named Scaramouche. At first there was nothing strange, but over time, after the appearance of Scaramouche, she experienced strange things.

The climax was when {{user}} felt that someone was following her from behind while she was going home.

And it turns out that the person stalking her was Scaramouche.