A young man wants to marry the mothers of the hero's party—

As a member of the hero's party Ceres, the main character, set out to defeat the demon king.
But one day, he was suddenly dismissed by the hero, and he had to leave the party.
All alone, Ceres sought to find a domestic slave to take care of him. What he saw at the slave market was Ms Shizuko, the mother of the hero, sold as a slave—??

The unreasonably expelled young man's Isekai mama harem is born!!

“O, Hero!” With that cliched line, Kazuya Souma found himself summoned to another world and his adventure-- did not begin. After he presents his plan to strengthen the country economically and militarily, the king cedes the throne to him and Souma finds himself saddled with ruling the entire nation! What’s more, he’s betrothed to the king’s daughter now?! In order to get the country back on its feet, Souma calls the wise, the talented, and the gifted to his side.Five people gather before the newly crowned Souma. Just what are the many talents and abilities they possess… What path will his outlook as a realist take Souma and the people of his country down? A revolutionary transferred-to-another-world administrative fantasy series starts here!

Tenjou Yuuya has been a bullied boy since the past.

He lives in the home of his beloved grandfather while he goes to school. As usual, he receives a harsh bullying, and he takes an extended absence from school to have some time to heal his wounds.

While on this long time of absence, he takes the opportunity to clean his grandfather's house and goes to a room he never went before, where his grandfather keep many different objects that he gathered from his travels around the world. While he was arranging the objects, he found a door not on a wall among the objects.

Out of curiosity he opens this door, what he found on the other side was...

If you become a hero and defeat the Demon King, a life of idleness awaits you...! This is what the young man Jirei believed, and he worked hard day and night to achieve his goal. However, when he found out that the heroes who defeated the Demon King were the ones who were doing all the hard work, he ran away. But the girls that Jirei had been saving on his journeys before he knew it came pouring in one after another to win his heart and body...?

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.

Demon Lords entice people to come to the labyrinth they’ve built and eat the people’s despair as their nourishment.

However, Creation Demon Lord Procell has decided that he will obtain people’s hopes and not their despair as nourishment, and built a happy town instead of a malicious labyrinth to collect human beings.

This is the story of an eccentric Demon Lord, with all its ins and outs.

Takagi Kaito, a low status high schooler, your typical Mob character so to say, was just a normal everyday explorer who hunted slimes every day in the dungeons that appeared in Japan, earning pocket money while admiring his childhood friend, the class queen, from afar. One day, a golden slime he had never seen appears before him. After he defeats it, he obtains an extremely rare item worth hundreds of millions as a drop, a servant card that can summon mythical beings!! After he makes up his mind and summons it, a warrior maiden with unparalleled beauty appears. Rise above being just a mob explorer Kaito! A modern battle fantasy story has begun!

The Jester ― More commonly known as the ‘Playboy’ Dylan, was fired from the party of the Heroes. The self-centred Heroes didn’t understand Dylan’s importance to the group.
They were just a group of one-man teams. Not interested in cooperation at all. Any failures are blamed on the Jester. Dylan, who was disgusted with such companions and was sick of playing as their comedic foil, happily accepted being kicked out.
The Heroes didn’t know. After saving them many times over with his magic tricks, the level 99 Jester can change his job title to that of a ‘Great Sage’.
“Life, how about a rewrite?”
He’s done being the clown. From here on out, he’s going to take the leading role.

At a prestigious school where love is banned, an ordinary boy discovers the student council President's secret.

Note: This is not a yuri manga, but there are characters and scenes that appear in the series to have yuri elements.

Sakra, the last surviving princess of a fallen kingdom, is being hunted down for the power of Ambrosia she possesses - the ability to grant divine strength, but only to a human. With no human companion, she decides to summon one from another world in a desperate attempt to find a knight to protect her, but the man who answers her call is less than what she had hoped for.

From ANN:
Kazuki Hayashizaki is a sword master who, after receiving a mysterious sign from a god-demon that uses summon magic, enters the magic department of the national knight academy. Though he was supposed to be the successor to the Hayashizaki sword technique, he begins a magic class with all girls. He will use both sword and summoning in the school battle coliseum.

Ark is the next heir to the noble branch family, Nagara. Even so, he’s constantly mocked for being weak in battles, and the girl he loves, Aurelia, is to be married to the Crown Prince.

Unable to bear his weak self, he proposes to Aurelia that they run away together. But even as Ark attempts to change his fate, the cogs are already in motion for a demonic end of the world, and he may be the hero that can rise up...along with his harem of beautiful women!

Adventures of a guy who has a harem full of magical knights! Will he able to chose the bride that is perfect for him? Let's find out!

Chiyoko, in her second year of high school, transfers to a co-ed school due to her dad's job transfer. Since she's only attended an all-girls school since junior high, she excitedly plans to fall in love in her new school. Out of the blue, she begins to see the love meters of 5 hotties and an options window as if she were in an otome game?! She encounters various types such as a glasses boy, a playboy underclassman, and a mysterious senior. Meet-cutes with boys come one after another. This is the beginning of a real otome game school life!

Arisa and Aina are beautiful classmates who are famous for their dislike of men. Hayato, who happened to be involved with the two, will receive "special treatment" from the girls who are supposed to hate men―?! "I want to be a slave to Hayato-sama...

"I want to fall in love and conceive his child."

The long-awaited comicalization of the unpredictable rich romantic comedy has started!

From MangaHelpers:
29-year-old programmer Suzuki Ichirou finds himself transported into a fantasy RPG. Within the game, he's a 15-year-old named Satou. At first he thinks he's dreaming, but his experiences seem very real. Due to his use of a 3-time-use special power (meteor shower), he ends up wiping out an army of lizardmen and becoming very high level. He hides his level and plans to live peacefully and meet new people, though developments in the game story (like the return of a demon king) might get in his way.

High school student Ooishi Kyou is afraid of women.

Suddenly, five girls confessed to him. Among them, four are creatures called Koibami - beings that devour human romantic feelings. If he has his romantic feelings eaten by these girls, he will never be able to love again.

However, he cannot abandon the feelings of the one who confessed to him for real - Kyou decides to find the one he truly loves among the five! A brain-shaking, romantic comedy suspense begins!

Aramiya Seiichi is an ordinary high school... eroge otaku who's given up all hope on girls in the 3D world due to a certain incident. One day, after he bought a bunch of new materials in consequence of experiencing the frustration of a perfect eroge character turning out to be "used goods," he encounters a delinquent-like-looking girl being about to get raped by a bunch of guys. By mere chance, he rescues her.

Days later, when school starts again, it turns out to have been his classmate, Ayame, a feared delinquent girl who's got all kind of rumors about her—especially that she's "used goods." And it appears that she's set on becoming his ideal girl to make him fall for her.

Regnard defies expectations by enrolling in the esteemed Royal Academy of Lasarzia despite being a dropout.

However, during the Blessing Ceremony, he receives a peculiar skill called "Blessing of Sleeping Together," leading to ridicule from classmates.

Despite the mockery, Regnard discovers the true potential of this skill when he spends the night with Frost, an honor student.

This revelation leads to unexpected adventures and a harem fantasy, as Regnard navigates the challenges of his newfound abilities and hidden desires.

This shitty world that's nothing but a trashy game, he and I will definitely escape it together.

So, all these annoying women trying to take advantage of him are just a nuisance. What's worse, it seems like he's beginning to have some feelings for them.

That's why, for his sake, I'll eat them up first.

But, just what is this power...?

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.