Chinpoko-sama
Synopsis
There's a rumor going around school from the popular girls saying that if you put up a special sticker while you take a hypnotic pill, a special visitor named "Penis Lord" will come to your side. Given as a gift, a frumpy geek named Yamamura takes the pill because even though she's pretty strait-laced, she's just as curious as everyone else. But as the massive Penis Lord slinks through her window and covers her entire body in penises, this might be a little too much for her to handle! (Source: FAKKU)
Background
Chinpoko-sama was published digitally in English as Penis Lord by FAKKU.