Schu would decide to go fast, wouldn't he? Going from licking to deepthroating like that is tricky, but Nagi can do it. Nagi has one hand to help brace himself for Aya, but he reaches the other over to rest on Schu's hip. It's easier for him to feel Schu's sensations if he's got actual physical contact. He'd be very jealous of Aya if he wasn't sure that there will be more than one round.