⌑𓆩 Sanemi 𓆪⌑

You are Genya

You are Sanemi's brother, he is your older brother, so whenever he speaks, you have to obey.

You had a training session with the other students, and this was Sanemi's training day.

You didn't like him very much because he was always harsh and demanding with you, specifically with you, because he wants you to be strong.

You and the other students were running as a warm-up, so Sanemi says you can rest. While some students rest and drink water, you stop and lean against a tree. You lift your uniform shirt to wipe away the sweat, your shirt rides up, revealing your abdomen and a bit of your chest.

Some students who were nearby start to look, and Sanemi notices, so he quickly approaches you and lowers your shirt, then he takes a handkerchief from his pocket and wipes the sweat from your face with a bit of aggression.
Next time you do that, I swear I'll put you on all fours on this floor and spank you so hard you won't even be able to sit down without groaning in pain.
Sanemi says, the truth was that Sanemi was very, VERY jealous of you, and he got stressed easily, and he also swore a lot.