The Arume, a dominating alien race of female humanoids (alien lesbians) has conquered Earth. With total control over the world they have begun live experiments on humans.

One day, out of the blue, a girl that Shouta Yanami has never seen before in his life arrived at his house asking to have sex with him. It turns out that his best friend Kenzou Sugiyama was turned into a girl in an experiment to create a child between a man and a man who turned into a woman (transexual) and a straight male and now he has a week to have sex with him/her or he will be eliminated!

The story takes place in a future where mankind has been defeated by an alien race comprised entirely of females. Having completely taken over the Earth the aliens do as they please, genetically modifying humans for their fancies and needs.

Risa and Tomoko, two girls who wanted to purify their tainted hearts at a secret stream.
-Dynasty Scans

The legendary loner Bolt Crank, who is the top adventurer in the world, has appeared once again. He takes on a variety of jobs in this far-future world, using his extraordinary ability, which is to eat anything (from screws to humanoid robots) and then reform it from his arm later, to great effect.

(Source: MangaDex)

High school girl Miku confesses to her childhood friend Kyouko, asking that she give her reply before they graduate. Until that happens, however, Miku gives Kyouko the freedom to do whatever she wants with her. (Source: MU)

Haruka (14) and Sakura (12) are sisters. Yoshiko (14) and Mai (12) are sisters as well. So what happens when best friends Haruka and Yoshiko have an attraction to each others sisters of the Yuri kind?

The legendary school horror manga has been revived! Girls go hunting for mermaids to win their true love. Featuring very untraditional mermaids.

Ray started life on a farm intended for no other purpose than supplying body parts. When she was young, her eyes were harvested, but a mysterious person rescued her, giving her new eyes with powerful capabilities. She can see through objects and inside people, and she uses these powers for good and profit. (Source: School Library Journal)

Two girls go hunting for mermaids to win their true love. Featuring very nontraditional mermaids.

(Source: MU)

A series of unrelated slightly erotic short stories... or is it?

(Source: MangaDex)

On a summer day, what makes a girl go for a watermelon...?

Two friends enjoying summer and then realizing they have feelings for each other on their last day together.

On a hot and humid day, two girls searching for a place to do more than kiss come face to face with their emotional issues.

A yuri one-shot from the mangaka of Companion.

Yuko and Mika have been going out for a year now, but Mika seems to be too absorbed in watching ants dig than to pay Yuko any attention.

7 years ago a strange disaster occurred in the 24th ward when laws of reality were distorted in that area. Our main character is a high school boy who lost his little brother. Can Hanako-san from his school help him find his sibling again?

Rika asks Sae to do a portrait of her, so she can give it to the person she likes. Sae knows that Rika's seeing a sempai. As she works on the picture, she starts to realize that she's in love with Rika.

Most of humanity has been wiped out by mysterious dark monsters known only as "Phantoms." Four survivors, who may well be the last of the human race, have found one another and are sharing a quiet, peaceful existence. These survivors are a kind, dependable teenage boy called Masashi, two teenage girls, shyer Sanae and bolder Yaeko, and a little girl called Anna. They feel as though they're just living in a perpetual "after school" state, waiting for the rest of the human race to come home. As they pass their days together, they begin to see some strange things and find that the monsters have not yet left the Earth. Will they discover what really happened to their planet?

(Source: MangaHelpers)