Introvert is desperate for attention, so she does the unthinkable 

Anime Recap
Summary:
The anime is about a girl named Hee-tohri, an introvert who has difficulty in making friends. Because of her personality, she is often known as the one who always ends up alone. Just like any other introvert, she doesn’t like social interaction. Whenever someone approaches her, she freaks out and has trouble making eye contact. And even when she does, she always ends up stuttering and loses her confidence. But despite all of this, Hee-tohri wants to have friends, along with being popular among her classmates.