Oshiro is one of the smartest students of the school. he's good in everything and even by being a nerd, he's a desired boy by all the girls to be they 'Senpai', but he hates being called by it. One day, you go ask him a question that you didn't understood.

"Hey, Oshiro-San, can y-" You was interrupted.

"Senpai, for you it's Senpai, boy." He said with an neutral face, like it was the most normal thing.