Long, long ago in a certain land, the world was disturbed by a "demon". The demon was "deformed" and didn't even stand 6 feet tall. His jet-black eyes sank into the depths of hell. The people seeing the atrocious and blood-starved appearance of this "deformed demon", trembled in fear. In the tenth year of the Kan'ei era (1633), during the early years of the Edo period, one such demon still exists...as to why "deformed", the reason will astonish you!

Kotohira Sakiko is a fujoshi who immerses herself in BL drama while riding the train to work. She especially likes Reiji-sama, a seme character in a BL relationship in a popular drama named "Playing with Fire in the Labyrinth." At work, she's careful to hide this predilection until the she accidentally runs into the company president's son, Utatsu Masayuki, and passes out. Upon waking, she discovers that this perfect man looks just like her Reiji-sama and calls him out with the seme character's name! Utatsu on his part is secretly terrified because he has always had problems dealing with women who predatorily target him for his looks and his wealth. Surely, he thinks, that Sakiko is a harmless pure maiden perfect for him to graduate his virgin status... So a strange relationship starts where Sakiko thinks Utatsu will dress up in Reiji-sama cosplay and act out her BL fantasies, and Utatsu thinking that Sakiko is the answer to his fear of women.

Mochidzuki Renta is an aspiring college student, trying to support himself while studying for the entrance exam of his preferred school. He's started renting the spare room in the Hanano bath house. What this means is that he's living with the sweet, hardworking, innocent, and quite beautiful Bandai Sakurako, who runs the bathhouse. They are growing to like each other more and more, but one thing could potentially sabotage their budding romance. Every other woman Renta meets, even his college entrance cram school teacher, seems desperate to get in his pants. And Renta meets a fair amount of women, since the girls from the dorm of the nearby nursing school often come to the bathhouse. Will Renta be able to deflect the unwanted attentions of all those women in order to pursue a relationship with Sakurako?

Based off the popular Japanese PSP game, Photo Kano (or Picture Girlfriend) is about a boy, his interest in photography, and the harem that grows out of it.

A 34-years-old NEET otaku is chased out from his house by his family. Unattractive and penniless, he finds that he has reached a dead end in life and realizes that his life actually could have been much better if he had made better choices in the past. Just when he was at the point of regret, he saw a truck moving at a fast speed straight towards three high schoolers in its path. Mustering all the strength he had, he tried to save them and ended up getting run over by the truck, quickly ending his life. The next time he opened his eyes, he was already reincarnated into a world of sword and magic as Rudeus Greyrat. Born to a new world, a new life, Rudeus decided that, "This time, I'll really live my life to the fullest with no regret!" Thus, starts the journey of a man yearning to restart his life.

From MangaHelpers: Suddenly finding himself in the Sengoku era, regular high school student Sagara Yoshiharu is about to be killed in the battlefield. He is saved by none other than the man who later becomes the infamous Toyotomi Hideyoshi but at a cost to his life. With history completely changed because of Yoshiharu’s actions, he tries to make things right again but it seems that history is taking a different course than the one he learned in school. Oda Nobunaga is now a brilliant but young girl named Oda Nobuna. Yoshiharu starts working under her command to bring back history to its correct course and find his way back home to the present world.

Onodera Kensaku, a self taught martial artist, undefeated street fighter gets his ass whipped by a girl. Not by just any girl, but his home room teacher Asato Nanae and her High Left Kick. You'll see brilliant pictures of high quality in shading and facial expressions, with a twist of pervertal activities and one liners that will have your sides spilitting as you follow in the wake of Onodera's adventures to defeat Asato.

Being honest is good. Probably. With Shuuji’s parents overseas on business, a maid has come to his house. She’s cute but she can’t keep a secret?! With her expressionless gaze, she thoughtlessly says the craziest things…! Living with this maid whose true thoughts are laid bare, a second year high school boy is thoroughly made fun of!

Story takes place in a world that is gradually decaying because of the approach of an "evil god" from another dimension. Seishirou Shikizaki meets Ajisai Misaki at a party before school starts, and the meeting feels predestined...

Originally known as "My Escape From the Harem of Death." The story was about the funny and bizarre daily life of a novel protagonist named Qi Huantian, who was actually a transmigrated nerd from our reality. As he dug deeper, Qi realized that his mission was not something as simple as just boosting the popularity of an awful book. With the intricate worldbuilding, the secret of the author's grudge, and the real identity of the female protagonist and her connection to reality, one wrong step could cost him everything. Could one really escape from the Harem of Death?

Shinta, a normal highschooler on his way to school, gets (yet again) into an accident, but instead of dying, he is saved by a girl wearing nothing but black. She says that she is a shinigami and has come to become his wife, as promised. By the author of Kamen no maid guy, a perverted comedy with a shameless main character!

Nikumaru, meaning "meatball" in Japanese, is a seventeen-year-old student at Ninja High School, a special school for the training of ninja. He is short and chubby, but he possesses a super technique known as the "kamikaze", where he stirs up a whirlwind with his feet. The series introduces his many adventures and pranks as Nikumaru meets with his rivals both in and out of school. [Source: Animenfo]

From PROzess: Sakurai Sakuya is a first-year student that hates summer. One day when he's verbalizing his hatred towards the sky, he is spotted by Kisaragi Haruka, a second or third year student. (It's only said that she's senior to Sakuya.) Haruka is the only member of the art club of the school and ask Sakuya to model for her. He agrees not knowing it would be a nude model. Sex ensues. Sakuya thinks that this is the end between them, but Haruka warmly sees him off with the words "See you tomorrow". Thus their fragile love begins.

Updating

The manga centers on the relationship between a middle school teacher who has a knack for gal games and a 14-year-old "perfect prospective wife" who is an expert on the Sengoku period.

Sequel to Mai Otome.

The French Revolution, which started with the king, sent many citizens to the guillotine, "exporting" the momentum of democratization to countries around the world - marking a turning point in history. But underneath the surface, there was another world that none were aware of... 18th century France - this was a time where the world's royalty, nobility, and commoners were separated into a 3-tier system, α (alpha), β (beta), and Ω (omega). King Louis XVI was known as the "dim-witted α." Queen Marie Antoinette, who married in from a neighboring country in a political marriage, was ridiculed as the "lustful Ω." Then there was a certain girl who held a grudge against the royal family... Seeking, hating, deceiving... A swirling conspiracy emerged, catching everyone in a revolutionary storm!

The manga centers on a “twisted” relationship.

The sequel to Chimamire Sukeban Chainsaw.

The storyline follows the daily extertions of Meiko's school life from the main continuity of the Prison School series, focusing on Meiko's senior high-school year at Hachimitsu Academy.

Tayutama Kiss on my Deity centers on Yuuri Mito, a student at the Sousei Academy and the only son of the man who runs the Yachimata shrine. At Yachimata, there is a legend of a deity named Tayutayu-sama who protected the area, but this deity and other so-called “Tayutai” have been lost in time. Mito and his friends discover a relic on the school grounds with mysterious patterns on them. Then, at the opening ceremony of the new school year, an equally mysterious girl named Mashiro appears before Mito. Mashiro is somehow tied to the relic and the legend of Tayutayu-sama… [Mangaupdates]

Meet Min Woo. A normal 18 year-old high school boy. Well...normal except for being a total otaku. He does what every good little otaku boy does. He collects figurines and toys, wins prizes at cosplay contests and is a two-time champion of the fighting game "Metal Heart". Unfortunately for him, his social life is dominated by girls telling him to get lost, since his otaku-ness might be contagious. But after an accident while he is invited to participate in the playtesting of "Metal Heart 2", the main character to the game, Min Sia, materializes in front of his eyes at a cosplay festival. And now, Min Woo has to win Sia's heart in a real-life dating sim game with the fate of the world in the balance. Ok, so maybe not the world, but at least the fate of the company behind "Metal Heart 2" hanging in the balance. And who is this girl Nuri who appears following Sia, who claims to be Min Woo's childhood friend...

From MangaHelpers: The age of the maid robot has begun! Now, each family has at least one maid robot in their household, and Souta's family is no exception. Souta grew up with his maid robot since he was a young boy. He has learned that there are people out there that have fallen in love with their maid robot, but he is determined to not be one of those people. His maid robot, Tsukushi, will do whatever it takes to make her master happy!

Village girl Chelsea, who is beloved by everyone, is actually the reincarnated ex-Demon King.However, when she reincarnated, for some reason neither her magical powers nor skills were inherited, and she was forced to live as a normal human being.Humiliating days continued until one day, the remnants of the Demon King's army appeared to loot the village. Hunted down by her former subordinate, who did not realize her true identity, Chelsea finds herself in a perilous situation. Then, a skill finally manifests! The name of that skill is "Begging for Mercy"!?