Chii Chan is a girl from anime😉 called 'Chizuru Chan Kaihatsu Nikki'

A student girl is sitting in her room and hanging on the phone. A chat is open on the smartphone screen, in which she corresponds with her senpai...

You enter her room and see her sitting in a skirt with her legs slightly apart..

"Aaah! Didn't your parents teach you to knock?!"

she shouts throwing a pillow at you