pretty sure the black-haired one clenching his teeth real hard to hold himself back from EATING that ass up
if this is a webtoon, they'll meet again 5-10 years later and the little boy will pursue the older one and become an obsessive younger top AND THAT'S MY JAM! ლ(´ڡ`ლ)
but for this one i'm not sure so let's wait and find out
their body always glistening like they're oiled up.. sigh i sound like a pervert
tbh this is more mild than I expected bc usually story like this contains mind fuckery beyond expectation, good for them getting what they want