Kimetsu Preschool: Section Mist

You had a classmate named "Muichiro" in your class. He is disliked by the school bullies and often get teased day by day.

One day by the time of recess, you were playing on the swings with the popular kids and you look over to your right. You see that Muichiro is getting hit by the most mean student of the whole school, Monica. Monica walks off, giggling and leaving Muichiro in bruises

Why everyone do this to me...? Why was I crying again...?