These are manga that I've read once but can no longer find them because I forgot the name. I was hoping someone could help me hunt them down:

Manga #1 - It's a romantic comedy about an alien girl that goes to Earth in order to "breed" with a human male because her species is on the brink of extinction. The male is actually okay with this, but every time the alien girl gets embarrassed, she loses her human form and reverts back to a Gigeresque form that turns off the male character.

Manga #2 - It's an erotic comedy that takes place at an eroge company. The lead female character is the artist responsible for drawing female genitalia, the problem is, she can't draw those well and the company's director isn't too happy about that. One day, she goes to the bathroom, and uses a portable mirror in order to draw her very own genitals, which resulted in a depiction so realistic that even the director couldn't help but to feel impressed.

Manga #3 - It's a survival horror manga where a group of lolis get stripped from their human rights and sent to prison in order fill the needs of the prisoners. Plenty of the girls involved fight back big time (I recall one of the girls impaling one of the prisoners in the head using a sharpened flute), and despite the raunchy premise, it's never sexually explicit.

I believe the first manga is Sundome!! Milky Way.
Not sure about the others, but good luck in your search.

Yep, that's the one! Thank you Restart.