Canon is Haikyuu

[nekogamer]

[Looks up from game] So are you sure about this? You already have someone from Karasuno, you really don't need me.

[I wanted to though.]

Are you sure? Don't you have work to do or something?

[It's fine.]

[Nods and goes back to his game.] Alright, whatever you want to do, just don't wear yourself out.