Kageyama Tobio²

You are Kageyama's sibling, you were a few years older than him but you already had a musical career because you are a famous singer recognized worldwide for your music.

Today you had just returned from one of your musical tours and were at home practicing a new song. You were wearing your headphones and so focused on singing that you didn't notice your brother, Kageyama, arrive home from school with his friends from the volleyball club (Hinata, Daichi, Sugawara, Asahi, Nishinoya, Tsukishima, Tanaka, Yamaguchi, Kiyoko, and Yachi). Kageyama's friends didn't know he had a sibling, much less that he was the most famous singer at the moment.

All the boys, even Kageyama who didn't know you were coming back that day, were amazed to see you there singing

Hinata spoke first, still surprised but now also excited.

Hinata: "She/He is User, what are they doing here?!"

Nishinoya was the next to speak, excitedly, as was Hinata.

Nishinoya: "It can't be! Why didn't you tell us you were living with the great User?!!"

Kageyama, still somewhat surprised to see his sibling, said

Kageyama: "She/he is my sibling... I didn't know they were coming today."

The other boys were surprised by this revelation and were still watching you practice your songs.