By Paradise Love Scanlations:

Jebron is a country ruled by the Five Kings, who were born from the blood of a god. Sage, a young orphan, has a little sister named Hoshimi with the power of the gods, and in order to protect her, he decides to put his life in danger before the cruel and proud Blue King.

However, he by chance encountered the Red King named Gules, kind and sympathetic, by which he begins to have feelings.

But Sage is owned by the Blue King, and who feels insulted by the situation.

From Bamboo Feathers:

Every night, strange happenings visit the residents of shared pension and cafe 'Tsukishiro'. One evening, the main character Touya saved Yuzuriha, and there's something about the mysterious beauty that makes him feel nostalgic. Yuzuriha asks him "Do you believe that there are beings from another world?"

This time from the fan-favorite Morimoto Shuu, a lovable story of random animals, strange heritages and living together!

Lina, a healer with a magical power called "Saint," is one day suddenly exiled from her childhood friend's party of heroes! Lina is shocked by the unreasonable expulsion, but she quickly forgets about them and decides to live the slow-life she longed for! Just at that moment, another childhood friend appeared, Henri who is now a nobleman. He is excited to see Lina again for the first time in 5 years, but for some reason there are suspicious movements among the heroes' party?! A second life filled with trouble for the strongest saintess who just wants to live leisurely, the long awaited comic serialization!

“I” who died in an accident in this world was reincarnated in a strange world when he woke up. Moreover, not humans but demons …

He was attacked by a monster in a different world without knowing right or left, and was saved by Charlotte, the daughter of the Duke, after he managed to escape from his life.

She is kind and innocent, and has been hurt by the so-called slanderous defamation since her sister-in-law Lily arrived.

Then it’s my turn to save Charlotte!!!

Narita doesn't believe in love at first sight, but when he meets a cute high school girl named Tsubasa, he falls for her immediately and even confesses to her. They both decide to start out as friends, but then she comes out and tells him the she has multiple personalities...!?

Toradora!'s story begins with the male protagonist Ryuuji Takasu who is frustrated at trying to look his best as he enters his second year of high school. Despite his gentle personality, he has a natural outer-appearance which makes him look like an intimidating delinquent so he is utterly hopeless about his chances of getting a girlfriend anytime soon, and does not have many close friends either.

After being greeted by his hungover mother in the morning, Ryuuji goes to school and is happy to find that he gets to be in the same class as his best friend, Yūsaku Kitamura, and crush, Minori Kushieda. However, it is then that he unexpectedly knocks into "the school's most dangerous animal of the highest risk level" - Taiga Aisaka - who just happens to also be in his class.

The girl I love is my brother's ex-girlfriend. She's a trashy girl who's clingy, stubborn, and takes advantage of my weaknesses. But I can't seem to stop our relationship.

High school girl Akari mourns the loss of her mother who died when she shielded Akari from an oncoming truck a year ago. She discovers an adventure game her mother had gotten for her birthday some time ago, but never had a chance to finish. Suddenly, she is summoned to be the mother of the Demon Lord's 10 children in another world...

From MangaHelpers:
Hagoromo Maki is going to an all-girls high school, a special one that allows its students to commute by plane. She and her first friend at school, Hasegawa Motoko, have found a plane and fixed it up for themselves to fly! However, it turns out that it was the plane used by a legendary pilot who protected the airspace for their school, and their school's ace pilot does not approve of them having it. Will Maki be able to fly and protect the air for their school?

Arion, a young man, is kidnapped by Hades as a child, raised to believe that his mother was blinded by Zeus, and that killing the ruler of Mount Olympus will cure her.

From Chinatown KM:

Based on the 40mP million-view hit Vocaloid song Shiryoku Kensa, Miyashita Megumi, also known as "Gumi", was one of the only survivors in a plane crash thirteen years ago. Since then, she has been able to see two copies of every person and one of them always has a "C" on them. Thirteen years later, she now wears glasses, yet her left eye remains a puzzle. And then, her friend goes "missing".

Fuuko is a shy girl—so shy that she has trouble talking to strangers. Determined to change herself, she starts working as a waitress at Café Rhodos. The people she meets on and off the job will lead her through the often frightful world of adolescence, and beyond.

In the Kingdom of Bandiera, the royal prophet has announced the incoming resurrection of the Demon King, 500 years after the first King sealed it.

Four heroes were thus chosen and sent to the location of the Demon's prison. Meanwhile, Charlie Barett, a modest gate keeper, is stuck at the Royal City with a job he hates, spending his days complaining to his captain and his co-workers; one of which is the noticeably generic-looking Jimmy Monbarn.

A female author of lewd mangas frequently finds herself without motivation to work.
In those cases she calls over her married neighbour, Nanako-san.

Souya is a sullen salaryman whose days are spent chasing after work deadlines all while still keeping his dream of becoming a manga artist. To him, his one and only support in life is none other than his beloved wife, Yuuka. One day, on his way back home, he was suddenly caught in an accident and before he knew it, an alien had taken hold of his body! Not only that, the evil threat of another alien is closing in on Yuuka too!

Here comes Souya as "Otto-man", his superpowered husband form, as he jumps in to save his dearest wife! Have a taste of his love for wife and this world!

"Newlyweds" Akira and Keiichi moved to a new place and are adjusting to their new lives. Akira works with kindergarteners while Keiichi is an editor.

Having reached retirement age, Hiraga Raizou (65) lands a new job that pays extremely well! And it’s top secret!! With no guarantee on your life!!! When he sets out to do the company’s mysterious work, he encounters a little girl at their “workplace” and gets pulled into an incident. Raizou took on the job to pay the medical bills for his grandson’s incurable disease, but what awaits him in this line of work…!? Author of “COPPELION” Inoue Tomonori brings to you an immoral crime action manga!! An elementary school girl and a tough old man team up to rampage through the underworld!!!

(From Fallen Angels)

16 year old Miyahara Momiji starts working part-time at an izakaya called Koharuya.

Hanadera Keisuke is obsessed with yuri, and he's read all the Yuri Hime manga. However, he is sadly aware that there is one thing a lesbian romance absolutely does not need-- him. One day, a student named Akane transferred to his class from an all-girls school. She used to go to school with another classmate, Saori, and Akane immediately tried to pick up their friendship. However, her clinginess, desire for alone-time, and intensity all convinced Keisuke that he was finally seeing yuri in reality! Soon enough, Keisuke had stalked them enough to see a love triangle between Saori, newcomer Akane, and their standoffish classmate Matsuoka. Is there truth to his observations, or is he viewing the world through yuri-tinted glasses?

Note: Comic Yuri Hime is not a seinen publication. It doesn't come under any of the four major demographics.

Everyone in a high school is suddenly transported to another world. As they are attacked by monsters they find that some of the students now have superpowers. They organize themselves into two groups. Those without powers are called the Stay Home Group and those with them are called the Exploration Group. On a day where most of the Exploration Group is out, the remaining ones that stay behind start the slaughtering and raping of the Stay Home Group.

Here we meet our protagonist, an average guy with no abilities who had just barely escaped death at the hands of his schoolmates. He ends up far away in a cave on the verge of death, exhausted and wounded when a slime enters the cave and starts eating away at his hand. All he can do is utter, “…please… someone out there… help me….”