Published in Gothic Lolita Bible which doesn't focus on manga, so it has no target demographics.

A story about sweet guy trying to hook up with an egotistical girl...but it's not really like that.

The Teenage Mutant Ninja Turtles (often shortened to TMNT or Ninja Turtles) are a fictional team of four teenage anthropomorphic turtles, who were trained by their anthropomorphic rat sensei in the art of ninjutsu and named after four Renaissance artists. From their home in the storm sewers of New York City, they battle petty criminals, evil overlords and alien invaders, all while remaining isolated from society-at-large.

From Easy Going Scans
On his right, his index finger on a trigger. On his left, a wedding ring. That is Tokichi's new life. A shy and clumsy salaryman, forced to become a hitman overnight. A double life: bowing during the day and gunfighting at night.
He also has to juggle the two women in his life: his domineering wife and the jealous girlfriend he has inherited as his secret persona.

Its about a boy that one day, wakes up as a big breasted woman. S/he has to deal with a pervert friend, new clothes and a mother that prefers him as a girl.

Due to bad behavior, Taiyou, is sent to a strict all-boys-highschool. However, due to gossip about his unchanged behavior and loose relationship with women, he has been called out by Sora, the honor student with a kind smile and also fhe dorm president. Because of Taiyou's rebellious attitude, Sora revealed his devilish sadistic nature and held Taiyou down under the guise of strict discipline. Furthermore, like finding a new toy to play with, He humiliated Taiyou after discovering that Taiyou is a virgin. Although Taiyou was stricken by fear and despair at first, the act gradually turned pleasurable and both of them developed an obsession out of nowhere.

Shou, the son of a gang member, became the right hand man of Taiki, the gang leader's son. On the way back from his high school entrance celebration, Shou runs into his long-time crush, Kunie, Taiki's cousin. Shou goes to Kunie's home on his request, but once there, Kunie asks him to become his. Shou refuses because of his allegiance to Taiki, but Kunie drugs Shou's drink and takes advantage of him!

The sequel to Wild Fangs, this chronological prequel follows Mao's brother Kiri's and his master's backstory.

A collection of short yaoi stories about secret one-sided love between good friends
One interesting story about 2 comic writers.

The characters Chikara and Kubo in chapter 4 appear again in Yume ga kanau 12-gatsu chapter 2.

High school student Xiao Xiang An is experiencing life in the big city for the first time while she is staying with her distant relatives. At the behest of her relative's friends, she ends up disguising herself and sneaking into a bar with them where she runs into a handsome and charming employee. The following day she goes back to her regular appearance only to have a very different encounter, meeting a guy who is nothing but rude and hateful! It's one of the top 10 of the best manhua.

Times continue to grow worse as criminals go after little girls. The police are always too late or keep losing their target. Who will protect the happiness of little girls?! A half-naked, bird mask wearing, NEET, lolicon will. An ally of justice! A phoenix that will protect the little girls from perverts, molesters and degenerates that lurk the neighborhood!

I Saw It is a biographical piece following the life of Nakazawa from his youngest days in post-war in Hiroshima up until his adulthood. I Saw It became the predecessor for Nakazawa's popular manga series Barefoot Gen.

The one who is closest is also the furthest away. An unrequited love BL story between cousins.

Nenji, touch me again! High-schooler, Taira has got a one-sided crush on his buddy, Nenji. One day, Taira invites Nenji over to his place to watch some of his older brother's porn collection, but in the heat of it all, they get turned on and things progress.

Everything fell apart after the miscarriage of Nori's sister. Her husband left her and she was reduced to a depressed shut-in. One day she suddenly brought home a cute little girl called Yumi-chan, who was supposed to be her friend's kid. Nori's sister soon regained her smile, but Nori felt something was off with Yumi-chan, and the rest of her family.

Strange events during a festival night.

Pro wrestler Fuji Kaoru disappeared one day during a match. Now five years later she shows up again at her old gym unnanounced, with her five-year-old daughter in tow. But not everyone is ready to welcome her back with open arms, especially her former best friend Yuri, whose anger and hurt at Kaoru's betrayal are far deeper than Kaoru ever imagined.

From DrCoke at MangaHelpers:

When Kamiyama Keito saw Oomiya Honden High School's (a.k.a. "Denkou") Rock Band "Kei-On" club, he was immediately struck by a sense of awe and admiration. Once he was admitted into the school, he immediately joined the club. To the despair of Keito, the club was run by two degenerate senior students who forbid any real practices. Once spring break turns around, Keito finds out that the two seniors were arrested for possession of marijuana, in turn pushing the club into the brink of termination. With the help of the only other member of the club, Tsukumo Shintaro, will Keito be able to prevent the termination of his club?

Two years have passed, and Sakaki and Okada haven’t been getting along well as of late. Okada is determined to make things work, but the younger man remains dissatisfied. Where exactly did it all go wrong?

From Attractive Fascinante:

1-3) Kyoushi and Kou have been lovers for 3 years, and their relationship has been discovered and accepted by Kyoushi's older sister. Now can their love withstand an overbearing, intrusive fan girl? How about an adorable 5-year old cousin who wants to marry Kyoushi?

4) Don't Touch Me
Bittersweet one-shot about the possibility of living life again and finding a new love after being raped.

5-6) Sou and Keigo have been friends for years, but Keigo never realized Sou's secret - his parents are both men. Now that Keigo is beginning to be more concerned about Sou, is it time to meet the parents? Even if both parents are men, will they approve of their son's preferences?

With a deep gaze, Oshima received a confession of "I love you!!" from his classmate, Hiyama.

And naturally, astounded by his confession, Oshima rejected him as he didn’t believe love between men and that made Hiyama became discouraged.

Trying to face with an earnest feeling, he’s immediately became interested in Hiyama. However, Oshima can’t be honest with himself… Are they friends? Or lovers? Be that as it may, both of their relationship will change!!