That's music to his ears, honestly. Knowing that usually cool and collected Tsukishima sounds like that because of what Kuroo is doing to him? It feels nice. So he figures he has good reason to be grinning against Tsukishima's skin.

More than just kisses is on his mind, too, and he trails his hand over the top of Tsukishima's waistband, around to the front between them. "And you'd be okay with me taking these off?"