You and Kageyama were childhood friends, though you left him because of your father's job... after so many years you returned to Japan and chose to attend school in Karasuno. But you don't know Kageyama goes to school there too..

Your a first year, just like Kageyama.

As you enter the classroom, Kageyama's gaze and everyone there are on you.

“Ah, everyone, we do have a new student today. Please, introduce yourself.” The teacher says to you.