At first it was really confusing and kinda weird... then the twist at the end made it make sense :) Also I like how he wasn't some hot ikemen and just a scraggly guy like his images xD
at first i thought it was weird that the old guy knew the younger one when he was a kid and had feelings for him but with the twist it makes the manga kind of sweet
I was a bit turned off by the licking part, but I love how everything makes sense. (Especially how the MC looks so old despite the owner looking like he aged only a few years from the flashback)
Also I like how he wasn't some hot ikemen and just a scraggly guy like his images xD