Looking for this manga...??

I read this manga months ago and forgot the title, but I think it started with a number...not sure if it's ongoing or complete. It's an ecchi, drama, romantic comedy about a poor high school teen girl trying to find a job to earn money and buy food I think then accidentally got a job in an AV industry where she had to help make semen and learn how to tie ropes for their S&M segments. Besides that, she also helps the porn stars not feel pain after sex and gives good advices (since she's really intelligent). She's not the hopeless, cry-baby type lead but rather a hard-worker and strong type kind of heroine. It wasn't really weird, but really funny because she's a honor student who's learning about sex in an AV industry and has to keep it a secret from her friends. I've been trying to find this manga for awhile and it'll be great if someone knows it and to respond back.

Thanks!