We Still Don’t Know the Name of the Flower We Pooped on That Day - Version 1.0 by Kurimanjuu (Eng) - Adult Sex Game

Despite good grades, the protagonist “Genki Shimoyama” struggles with socializing and fitting into his class.
His hobby was [Spying on girls in the restroom].
Meanwhile, Mayumi Gero, also an outcast, noticed Genki's filming...
A boy and a girl, headlong into newly discovered sexuality, a faintly bittersweet, summer “poop” memory.​