"I don't understand why there are letters in math," Kageyama said as he dropped his head on the table. Right above his study book in a clear sign of defeat, “it's no use, it's stupid.” Since they were always studying in your room, at least once a month they would meet after college to have their little afternoon of study. Kageyama hated it, but he put up with it to spend time with you. If only I could take the book out of your hands