Gakuen no Ouji to Game Jikkyousha

I don't know who she is, but she's very, very close!?

A serious honor roll student, Umeko Watanuki, is in love with the school's prince, Shizuru Inarida. However, she has almost no contact with him at school almost always thinking negatively about herself. All the while, Umeko is actually hiding a secret from everyone—she actually person behind the screen of a famous streamer, Tanupon! On the other hand, their school's prince, Inarida Shizuru, also has a secret side that he never shows to anyone!? So close, but so far—a school romantic comedy!

(Source: Kadokawa, translated)