Which one is the real you?! "Shota <=> Muscle Man" transformation harem comedy!
Highschooler Ryoutarou looks like a primary school boy, and all he wanted from his new school was to have a quiet and peaceful life. But on his first day in his new school the delinquent Mizuki calls him out and immediately destroys his dreams. Ryoutarou thinks he's in for a violent shakedown, but instead he's taken to a club room where girls with a certain sexual fetish gather....

Tanaka is a middle-aged man with a face only a mother could love and a personality that no mother could love. After dying from an accident, a god sends him to another world where he has healing magic.

Join Tanaka as he goes around ogling beautiful women and then watching them get fucked by men other than him. This is a new manga version of the LN isekai series of the same name, so if you read the first series you sure as shit know what’s going to happen.

I fell into the reverse harem novel! I'm going to live here quietly, but my god. The villain and the red thread are twisted....life is twisted.

Former black company employee, Jiro Tanaka leaves his job due to overwork. In his home, he founds a job recruitment template which is from another world company. The job is to test the dungeon created by the demon king. There, the days of diving into the dungeon as a "dungeon tester" were waiting for him to complete the dungeon that even the hero would not be able to clear. He has a hot dark elf boss who has an amazing ability "Magic resistance". The New life of our MC starts!

by: Socialweebs

"Cute" love story of girls who will stop at nothing but making the eyeless protagonist theirs!
Illustrated by Yom on his twitter (Miru Tights author)

Links:
Author's Twitter: https://twitter.com/y_o_m_y_o_m/
Author's pixiv: https://www.pixiv.net/en/users/6210796/

On a school trip to shinobi-themed Ninjatown, a young man named Ichi Kuno accidentally springs a mystical ninja trap which sends him back to the Age of the Ninja. Having no other path, he must pose as a girl and infiltrate Kurenai Academy, a school of kunoichi students, to retrieve a mystical scroll that can return him to the future. But when everyone around him is already far better at stealth and infiltration than he could ever imagine being, it's not going to be easy. He'll need to employ his own special bag of tricks, and have a lot of luck, if he's going to last more than 5 minutes surrounded by hot kunoichi girls, every one of whom would happily kill him in a moment if he's discovered.

An Otaku programmer who spent the last three years creating the world he desires on the computer suddenly encounters a BUG. He gets depressed and sleeps. When he wakes up, he finds himself in his own world with healing power.

Fujishirou Kousuke is currently an unfriendly and unsociable high school student. However, when he was younger, he made a promise with his childhood friend, Sayaka, that they would get married when they grew up. But one day, Kousuke is kidnapped and taken to a place that strangely resembles a prison. Little does he know though, is that this "prison" is guarded by very voluptuous women... Can Kousuke remain a virgin to fulfill his promise to Sayaka?

The general election of love begins with the seat of the No. 1 heroine! At this school, once a year, there is a so-called "Goddess General Election" that decides the school's No. 1 heroine "Goddess (Muse)". The childhood friend Tsugumi Aiba, whose main character, Shield, has a passion for, is the winner of the previous year. Her shadow classmate, Uzura Takahina, says, "She wants to participate in the goddess general election," at her shield, which is trying to do something with her hunger that was shaken by the thrush ...?

[From Viz]:
Being a teenage martial artist isn't easy, especially for Ranma Saotome, who went through a major transformation on a training mission with his father. After an accidental dunk into a legendary cursed spring in China, Ranma now changes into a girl every time he's splashed with cold water. That would be enough to complicate anyone's life, even without the arranged fiancée who doesn't like him (or says she doesn't) and the constant stream of rivals and suitors for both his male and female forms. What's a half-guy, half-girl to do?

Kozaburo, who dreams about becoming a doctor, moves to the countryside to focus on his university's admission exams. However, in this female-only town where he is moving to, three extremely beautiful sisters are living in his lodging house?!!
Besides, this town has a secret... it was a town where the Japanese version of Succubus, "Hinoenma," resided. Beings who steal men's essence. The 3 "Hinoenma" sisters in this town especially, wanted to try and sexually devour our protagonist!!!
Can Kozaburo concentrate on his studies in such an unpleasant environment?

Korea's first ever webnovel of the 'another world' genre, Memorize. The legend has returned in webtoon form!] Hall Plain, a different world from Earth. After being discharged from military service, Kim Su Hyun is suddenly abducted to the world of Hall Plain. After many twists and turns, he manages to reach the peak of the Hall Plain. However, all the anguish he had experienced during his 10 years in the Hall Plain left him in despair. To change his bitter past, Kim Su Hyun decides to use the Zero Code's power to turn back time 10 years. "It is absurd to use an object with such incredible power to simply turn back time. I will ask for the final time. Player Kim Su Hyun, do you truly wish to repeat those ten years of torment?" Seraph looked at me like she was pleading. I couldn't help but laugh for no particular reason. For no particular reason indeed.

Zeff Einstein spent his whole life mastering red magic and was finally recognized for it, yet a new spell that was soon created revealed that his talent for red magic was his lowest. Bitter at the thought of all his wasted effort, he creates a spell to send his old self back in time to his younger body and together with the determined "genius" mage Milly and the handsome swordswoman Claude, he intends to master magic more efficiently this time.

I, Takayama Aruto was summoned again in replay mode, keeping all of my past stats. This time, a large Hero’s Summoning was conducted which brought along the whole class. Sick of doing the job of a Hero, I hid my stats from the others and chose to become a merchant. But, I must have hidden my stats so well that our summoner thought I was trash and was casted aside. So, I decided to form a party with the three beauties in my class who were similarly thought to be useless (a Tsundere, a lolita and a meek girl)! But, it’s okay. I still have my Item Box and Item Shop. I’ll just have to make whatever it is I need! And so, I led a relaxed life in another world creating items DIY and hawking, but…… The Dragon Demon Lord and my past wife, a succubus comes knocking on my doorstep and seeking love. It seems that the transmigration this time is going to be troublesome yet again!

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TL;DR Version: OP Harem Isekai Protag gets Isekai'd again (with his entire class this time), hides double OP abilities for slow-life living, starts new harem with girls from the class and the harem from the first otherworld that followed him to this one.

Do you like working onee-san?

Three women appear before Kouta Nagase, claiming to be colleagues of his father, a famous producer who has recently gone missing.

It now falls upon him to take responsibility for a grand media project, the likes of which never seen before. But, all the people involved are crooks! In an industry overrun by greed and corruption, can Kouta make the 10 billion entertainment project a success?

A love comedy about working in the entertainment industry!

In Feudal Japan, the people of Edo are under siege by giant insects that ravage the land. The people desperately beg the government to do something about it. Thus the Insect Magistrate Office is established, gathering strong warriors to defend against the onset of pests.

Jinbee Tsukishima is a young man following the belief that a weak warrior isn't a warrior at all and strives to be a master swordsman just like his father. To atone for a horrific incident that occurred at his fault, Jinbee seeks to take his father's place as a member of the Insect Magistrate Office. On his journey there, he meets the lovely Haru, a young woman who helps manage her family's tea house, and is forced to put his sword to good use in saving her from a grisly fate. This act of bravery earns him a spot in the Insect Magistrate. Will this rookie exterminator be able to rid the land of the horde of insects swarming in?

In the world of the Goddess Wellos, women are blessed with strength and good looks and men with good luck after sex. The women who gain this godly strength and good looks become a Paladin and participate in battle and the men support the Paladins as Chevaliers. in Lente village, Kite, the son of a blacksmith, is a boy with a very strong libido. Former Paladin Lilia identifies him as a chevalier candidate and encourages him to join the Royal Academy in the capital to become a Royal Chevalier.

Nishizuru Yakki is a permanent part-timer, regular customer in a maid-cafe, and 20-year-old virgin. What makes him special is his ability to see ghosts. But ghosts are not monsters, they are mostly harmless. At least our hero can live by simply ignoring them. Yakki never believed in monsters until the day when he meets the girl named Rokka. This cheerful girl appears to have a secret...

After dropping out of the art school in Hokkaido, Hibino Ryouichiro moves to Tokyo and starts a living as a novice ero-manga artist Hanabino Q-ichiro.

Fuutarou Uesugi is a poor, antisocial ace student who one day meets the rich transfer student Itsuki Nakano. They argue but when Uesugi realizes he is to be her tutor, he tries to get on better terms. While trying to do so he meets four other girls.

Note: Won the award for Best Shounen Manga at the 43rd annual Kodansha Manga Awards.