Yu is sure that the color on his own face matches Yosuke's when he hears him say that. He's a bit nervous and quite self-aware, slightly worried that Yosuke's doing this just because Yu wants it. But he banishes that thought soon enough, trusting that his boyfriend will stop him if it doesn't feel good or if it's too much for him.

"If you can't, tell me..." Yu murmurs and gives him a short kiss with soft nip on the lip, and then moves to his neck. His fingers undo the button and Yu uses just palm of his hand to rub him up and down, through clothes.