I just searched for the tag "virgin school" and this is the manga that showed up: http://www.mangago.me/read-manga/kunshu_no_ai_wa_yoru_ni_hana_saku/
Ive never read it tho, so donno if its the right one xD
mangago.me/tag/
Unfortunately that's not it! But thanks anyway, I'll try searching the tags as well.
Good news! Found it (I had to look on another site)
http://www.mangago.me/read-manga/chikan_diary/
I know this manga took place in an all boy's school, renowned for being the "virgin school" or whatever since everyone who attended was a virgin. I think it was a religious school or something, hence the abstinence, anyway some person (the seme) transferred there and became a social paragon b/c he knows what sex is like. Therefore the uke, who is in charge of the school paper or something like that, is given the responsibility of asking him about sex and stuff.
I know that the punishment for not getting the information is "remaining a virgin forever". Ring a bell? I just can't think of the title at all so help would be appreciated, thanks!