Osananajimi Yori mo Eroi Mobko to no Houkago Ecchi -Boku wa Class no Jimiko ni Koi o Shita | 幼馴染みよりもエロいモブ子との放課後エッチ ～ボクはクラスの地味子に恋をした～

"Yamagami Hiroto" is a very ordinary and mediocre student.

He has a childhood friend a popular beautiful girl, Aoi Hinasaki. She likes Hiroto, but... The person in question did not feel so and she continued to have a one-sided love.

One day, Hiroto happens to come across a shocking scene. It's after school. It was a figure of 'a female student who masturbates alone and panting' in a classroom where no one should be.

(That's... if I remember correctly, we're in the same class... um... who is that?)

Her presence is so plain that I don't even know her name, she is "Sonoda Ayumi". She is masturbating in front of him.

And "Ayumi" looks up at the ceiling with an ecstatic expression while suppressing her voice.

Seeing her like that, "Hiroto" feels emotions for the first time. That was his first love...