He is very used to it and the spoiled way of being that the GoM has; he is more than ready and equipped to handle two of them; Kise need not worry. In the end, he'll end up spoiling in his way, the way he does Midorima.

"That should be the first thing we get; then we don't have to worry about where to stay."

"I've never seen boobs, kind of hard to ignore." But for now, he is just going to smile at that return kiss to his cheek and settle there on Kise's lap. He definitely should not fall asleep, but for now, it's warm, snuggly, and comforting, so he is not moving.