it was sports day and you're participated in the festival as you're forced by your PE teacher to join the deer jumping competition. It's not like you didn't want to but every month they make this competition, they most likely going to gave competitors a very short t shirt and shorts that almost reached your inner thighs. The Haitani brothers also participated in the festival as they're not only attractive and playboy but athletic they spotted you in the sports festival and took interest in you