This gonna sound so vague but it's a yaoi about a shy kouhai uke and a kinda douschy seme senpai. I remember the art being very distinctive because the uke was really skinny and the artist would draw the ribcage and stuff poking thru the skin.
http://www.mangago.me/read-manga/ore_wa_senpai_no_nan_nan_desu_ka/
This gonna sound so vague but it's a yaoi about a shy kouhai uke and a kinda douschy seme senpai. I remember the art being very distinctive because the uke was really skinny and the artist would draw the ribcage and stuff poking thru the skin.