Taken From Izumo No Ryuu:

It seems some killing machines have woken up, and want to destroy every sorcerer on the planet! But Orphen isn't allowed to die, so he must stop their evil plot. This is a side story to the first Orphen manga, but you don't have to know much about the Orphen universe, so go ahead, read on!

Dark and light magic used to coexist in Decentra, but light magicians banished their dark counterparts from the land in fear of their overwhelming power. Now nobody can use dark magic, its existence only known on paper…

Desperately hiding the fact that he possesses the forbidden dark magic, Azami Orikasa enrolls in the prestigious Kuzunoha Magic Academy, determined to become a great national magician and save his grandma’s orphanage from its financial doom. On the entrance ceremony day, Azami suddenly gets jumped on and bit in the neck by a guy with wolf’s ears… and is clearly in heat?! In attempt to calm down the wolf guy, Azami exposes his dark magic and soon finds himself in a troublesome deal…

A secret society of scientists seek to create advanced humanoid lifeforms through the hybrid of man and beast for their almighty Lord Yeshu and the new world that is nigh.

When young Shin'ichi Kuruma is pulled into this inhuman pursuit and loses everything, his path of bloody vengence leads him into the depths of a conspiracy greater than he could ever imagine.

From Ken Ishikawa, creator of Getter Robo and Kyomu Senki, is a tale of biblic myth, violent patricide and monstrous demonbeasts. This is Majuu Sensen: The Demonbeast Battlefront!

From Lililicious: Some of the chapters are just about sex, often in public places, but that isn't all Maka-Maka is about. It's about having someone who tells you your skin looks beautiful in the moonlight. It's about having someone who calls you the night of your birthday, when you're feeling down because you just slept with a guy who turned out to be a jerk, and thanks you for being born because she's so happy to have met you. What is Maka-Maka about? It's about Jun and Nene.

Doctor Mephisto is a man who is as skillful and handsome as he is mysterious and terrifying. He can cure any illness, heal fatal injuries, transform lead to gold, summon vicious monsters to do his bidding and perhaps even...revive the dead!?

Doumori Hiroto is a mysterious boy from a lineage of ancient spiritualist who have been guarding the pathway to the underworld for a thousand years.

But he was born with a defect caused by bloodline of magicians mixed into his ancestry.
He possessed both spirit and magic power instead of either, yet he was able to use neither.

For this reason, his grandpa took him to his friend, a chinese sage, to have Hiroto being taught the sage cultivation.
He quickly mastered the sage path and was said equal to a hundred years cultivator.
Somehow, thanks to his sage power he became able to wield his original spirit and magic power.
However, during an incident where he had to unleash his full power, the recoil of that power caused his existence to be erased from everyone's memory.

Adapted from Boon Scanlations:

Makai no Ossan is a slice-of-life-in-hell kind of gag web manga about an underworld family consisting of a middle-school student, his dad, mom, younger sister, and older brother.

William Twining is blessed with both brains and wealth. He attends a prestigious school and lives in a huge mansion with his uncle and butler. But when his uncle's business endeavours fail, the Twining family is left bankrupt. While searching in a storeroom of his home for objects to put up for sale, William stumbles upon a secret room. This room contains a magical seal, with which he unintentionally summons a demon. This demon, Dantalion, tells William that he wields sole authority in selecting the "substitute ruler" of the demon world! So naturally, the candidates for the throne will pursue the bewildered and annoyed young man...

So... you wake up one day after a two-year nap and discover that your father is dead. What do you do? Take over his kingdom and rule with an iron fist, of course! Laharl may be new to the whole Overlord scene, but with the help of the demon-girl Etna and the angel-ditz Flonne, he's going to be the greatest ruler the Netherworld has ever seen. All he has to do is get by the hordes of halfwit hellions determined to challenge him for the throne, foil an inter-dimensional plot and keep his own vassals from trying to kill him. Sound rough? Hell yeah. (from Broccoli)

The story takes place after the failed Shimabara Rebellion, led by Shiro Amakusa as a Christian uprising against the Shogunate. It ended...brutally, and Amakusa himself was executed. However, dark forces are at work, and Amakusa returns from the grave...

Yonezo Yonekura is a young student, who is just starting to mature and notice his old childhood friend Tomoyo. Unfortunately for him, Tomoyo only likes intelligent people, and let’s just say Yonezo isn’t the brightest crayon in the box. One day when walking home, a strange old man warns Yonezo not to touch a demonic book that he will come across on his way home from school, but when Yonezo sees the book, he is too curious and picks it up anyways...

From Lila Wolves:

After being abandoned in the forest, Master saved her. She's been staying with him ever since, but he left her one day. Bringing her to the place of his relative, he promised her that he will come for her someday. All she has left is the bell he left for her. Eight years have passed, Tamao is still waiting for him. Kengo, the child of the family she's living with, has always been in love with her. Despite being a model and the center of attraction of the girls, he was unable to catch her eyes. Just when he was trying hard to catch her attention, Master returned.

Looking just as he was eight years ago, who exactly is this "Master"? How will Kengo chase after his love now that Master has returned?

Hiromi is a high school girl who has never had a boyfriend but has always enjoyed matchmaking. Riko (her younger sister) is experiencing her first love. To make it a success, Hiromi tries to find out who is the special someone in her sister's heart. To her surprise, it is Nan--best known to be the school's most flirtatious guy. It would appear that Hiromi has to face her toughest matchmaking challenge ever.

[Taken from ShoujoMagic] :

1) Let's Make Love!! (Make Love Shiyo!!). (v01 ch1 to 6) Mari Nishimiya is a high school junior who's tired of playing it safe. Less concerned with her summer session and more with achieving the love of a lifetime, she ventures to a foreigners' pub with her childhood friend, Yuuta. There, she meets Leon Gardner, an American dancer with a talented tongue (...meaning, he's bilingual)! While Yuuta disapproves, having an unrequited love for Mari himself, he and other enemies of this international relationship may be powerless to stop it when Leon joins Mari's class as... (!!!)

Let's Make Love!! - Farside Story (Make Love Shiyo!! Chou - Bangaihen). (v01 omake). Shinjo Mayu parodies her own work by inserting new dialogue into some of her pages from v01. It's the tale of the Gardner family, where Leon is Papa, Chris is Mama, and Mari is their daughter! Additional curiosities included.

Let's Make More Love!! (Motto Make Love Shiyo!!). (v02 ch7). Mari wants to have an adult Christmas with Leon. Why is Leon so set against it?

Let's Always Make Love!! (Zutto Make Love Shiyo!!). (v02 ch8). Attending the international wedding of Leon's friend, Randy, has Mari thinking in a new way about her future. But when Mari begins to feel strangely sick and misses her period, the circumstance forces her to make an early decision! But Leon suddenly has to leave for America!? Why?? Mari isn't going to like the reason Randy gives her...

2) I Don't Need Any Scenario! (Shinario Nante Iranai!). (v02 ch9). This ground-breaking short story was Shinjo Mayu's first work to contain a provocative sex scene and to mark her as a borderline pornographer! Read the freetalk to learn more! Yuuya is the manager of the drama club, and he's very strict and exacting about how the student thespians handle their roles. Chiharu is supposed to be playing a woman in love, but there's no emotion in her performance! So it's handsome Yuuya's job to teach her how to long for a man... Was this scenario in the script!?

3) I Want to Be Painted with Your Color (Anata no Iro ni Somaritai). (v02 ch10). This short story is Shinjo Mayu's debut work. Kazumi Inoue wants to be transformed by the magic of a white wedding dress, and then painted in a man's color. The biggest delinquent in school, Kazuya Sakurai, wasn't who she had in mind, though! He's intent on painting her a different color -- why? Kazumi will have her wish - a transformation through the magic of a wedding dress - but not in a way that anyone expects!

(v02 omake). A whopping nine pages covering a variety of topics. Get a sneak peek into Shinjo Mayu's office, find out her favorite stories and characters, see Leon with a top knot, see Leon touch Yuuta in inappropriate ways, and at long last the burning question is answered: How are chihuahuas significant to this serialization!?

Umeko is a virgin and doesn't have a boyfriend. As an office worker moonlighting as a BL manga author, she's always fantasizing about her boss, Miyakado, as a bottom.

One day, she gets told by her editor, "Your manga isn't erotic at all! You're fired if you don't get a good look at a real life p*nis!" A flustered Umeko turns to Miyakado for help. He replies with, "There's no point if you don't see it erect" and pushes her down as he teases and licks her breasts and secret place...

"Teasing your body is very amusing." the long finger stimulating her most sensitive spot makes all her juices start to flow...

From Shinnen and Shoujo Crusade:

Bittersweet stories that make your heart race in a painful but happy way. A compilation of stories about one-sided love that will have your 100% sympathy.

Contains 5 short stories:
- Make Sweet
- Sugar Baby Love
- Meganegoshi no Kimi
- Haru, Urara
- Make Sweet - valentine special

As the strongest exorcist, a boy chosen by God was engaged in mortal combat with the Demon Kings. Although he bears the fate of humanity on his shoulders, he actually wants to make sweets peacefully. One day, he meets a girl... This is a story of love and hope growing in the midst of a holy war.

Osamu, a young man who died at a young age due to an incurable illness. His second life was to drift as a "spirit (demon)" in an unknown world! Osamu, who is hated by humans and unreasonably deprived of his "life," hopes that he "does not want to die anymore." At that time, he gained the power of "life-sucking" that feeds on the vitality of others. In addition, he will resist the approaching "death" by using the science that he continued to learn on the bed in the previous life and the creative magic that makes the best use of his own dexterity. I met an immortal girl who was despaired by being tossed with life like myself, "--You tried to kill me, you guys are bad." In order to live, we are leaning toward the "stealing side" ...? An anti-heroic fantasy where a ghost who wants to live and a girl who can't die conflict with the world!

Web novel: https://ncode.syosetu.com/n4532en/

Atsushi, an ex-chef, Torajirou, a high school baseball player, and Nakagawa, a famous ex-composer (all 3 losers in life) started up a Convenience Agency. Then, as if fate had a hand in it, Nakagawa once again crosses path with Takahashi, an incredibly talented young composer, when a job that needs Takahashi's expertise arises, rocking the three's otherwise quiet life towards a whole new direction. From making you laugh to moving you to tears, this is a story of love and peace, and the world as seen by losers.