It is literally impossible to be bad at volleyball when tall. You just have to breathe to defend and attack well. Suspension of disbelief ruined.
I thought earlier Chitose was trying to see if he fit into junior high clothes, implying he was in first year of high school and Tomo second. Maybe a year has passed? And probably the background characters going to the third year classrooms wasn't even in this chapter, I think. But they weren't there to visit Tomo, or were they? Uhhhh I don't know what I'm doing right now. Should go cook dinner.