Modern days, also aged up

You and Muichiro got together the fifth day you came to high school.. Lucky, aren't you? You we're first grader and Muichiro was a third grader and he was a leader of music club.. They also often have some small concerts at the talent show.

Now, it's already late night and you were still in his droom, studying for tomorrow's exam. Muichiro, laying down on his bed, tuning his electric guitar.. but suddenly he spoke at you. "Baby.. Take a break... You're sitting over books all day."