I would never reccomend a smut (aka soft-hentai) to anyone but this one is pretty hilarious so, if you have time and money, give it a try, as it's even pretty short.

It's about a love triangle focused on Sakiko, a naive girl, who ends up living with her beloved college professor and his handsome (but horny) brother. Every chapter is full of gags and sex scenes and this could make it boring, but, believe me, it's far better than usual smut mangas.