i found an K. G. AP manga on they have a long list of comics most hentai any ways i think the story is that the girl (don't know any of the names) takes this special gum that makes her horny then theres about 2 sex scenes then the AP happens the 1 more sex scene tell me what you think. here's the AP and the site is
http://www.mangakan.info/main.html
its call energetic love