Two alone in a muggy room, a little brother's lust is provoked by elder brother's armpit
hair. He allows little brother to use his armpit for masturbation...!?
A set of Boys-love hentai pics feat. male students. 10 pics (with/without under hair). 3rd work of the series, but the story has nothing to do with vol.1 and 2.
Various situations of doing it in school, such as sports and active club types, sempai-kouhai (upper and lower classman) types, all sorts of drawn characters.