Ezreal's back arches the rush pleasurable pain going straight to his cock and each thrust punches noises out of him and it seems the less Kayn is caring about making him feel good the better he feels.

It'll perhaps irritate him later on that it's getting fucked like that when he does come, from nothing but the other's cock, his hand, his bite, his body gripping the other tight as his cock jerks as he orgasms.