Now this had me at the first part, cause it's older guy perving on highschooler - though it's nothing sexual, just being conscious of him and obviously attracted. It redeemed itself with boy asking to wait until his graduation and being very sweet and very chaste about it. I swear I'm not a puritan, I think it's just that the boy was blander than white rice and I couldn't fathom the attraction for the life of me. Akiba-san never fucks him and it's killing the child :))).
There's a second story with childhood friends and I'm really digging the art on the faces.
Tonari no Sugar Boy