Another short Twitter manga about an old couple turned young again.

It’s rumored that Class 1-A of a certain all-girls high school is hell itself, with every teacher quitting in a matter of days after being subjected to the girls’ abuse. Ultra-plain Jimi Taro (his name literally sounds like the Japanese word for “boring/plain”) is the latest teacher for this class but is unfazed about the challenge he’s up against.

Cute teenage model Hananaka Momo is the first to try and get him to quit, going so far as to fake a sexual harassment! Meanwhile, blackmailers, sadists and more lurk in this classroom of pretty faces, ready to challenge their new teacher. But Jimi’s motto is “virgin for life, teacher for life,” and he’s prepared to school these girls in more ways than one!

After being reincarnated into another world where the chastity and moral values of men and women are reversed and women rule the land, Faust was raised by his mother as a rare male knight. He's quick to become a war hero with many achievements under his belt, but because he inherited his way of thinking from his previous world, there's a certain severe pain in his groin day in and day out when faced with the likes of a scantily clad Queen who may as well be in the nude or the sexual harassment of the well endowed Duchess he calls a friend, among others...

From ADV: Imagine a Neon Genesis Evangelion where choosing the right girl is more important than saving the world! That's the gist of Angelic Days--the hit manga that Eva fans have been waiting for! Based on a popular PC and Playstation 2 game released only in Japan, Angelic Days takes the angst-ridden Eva pilots and sets them in a lighter, brighter world.

Kosuke was killed by Truck-kun, and was given the ability to live in a new world. Additionally, he was provided two lovely assistants who would do anything for him. This is a story of his adventures with them.

When six-year-old Inés laid eyes on the handsome heir to House Escalante, she promptly made the boy her fiancé. Since noblemen are all the same, she figured she might as well choose a pretty one. But Lord Cárcel isn't ready for this sort of commitment just yet, and he spends the next decade and a half avoiding the marriage at all costs!

Luckily, that's no trouble for Inés, as this marriage failing is exactly what she wants. In fact, he has her blessing to sow his wild oats as long as he stays out of her business. Unfortunately, being a playboy isn't as fun when your fiancée gives you permission. And doesn't this mean she's cheating on him too? Now, Cárcel is determined to change Inés' mind about him and prove he can be the husband she's always wanted.

In a distant place, on a certain mountain, a young dragon has been captured by a beautiful female tiger. The two, who were predator and prey, begin a journey to find a way for two animals with very different life spans to live by each other's sides.

TL;DR: Tiger Woman x Dragon Boy

A girl with too much common sense, a boy whose sole ambition is to draw the perfect 2D bride, an addlebrained ghost member, and their always sleeping president — what is wrong with this art club?!

A tale about a modern deep-sea aquarium employee in Tokyo!

What's living in the overwhelming darkness deep within the sea? Take a glimpse into this strange world about a boy working at a deep sea aquarium.

Reaching his limit due to daily work, the corporate slave Enami Shuusuke collapses on the station platform one day. In that moment, memories of his childhood friend, Yorumiya Hina, who died in an accident, flash before his eyes.

"I'm sorry, I couldn’t save you then."

As Shuusuke falls into a deep sleep bearing regret, he finds himself time-leaping back 10 years! Thus begins the time-leap rom-com of a corporate slave reliving his youth in order to save the childhood friend he couldn't save 10 years ago!

Ryuuto Kashima is a gloomy high school student. Because of a punishment game, he was forced to confess to Runa Shirakawa, a girl from the top of school caste and admired by everyone. They ended up going out for the unexpected reason of "Err, I'm free now so..." but, Ryuuto ends up following and eavesdropping Runa getting confessed by a handsome soccer club member, and Runa bringing Ryuuto, whom she just started dating, to her own room as a matter of course. They have different friends and ways to have fun, different in just about everything. And yet, surprised by their differences everyday, accepting it, they begin to relate with each other. A love story that will make you feel wonderful when you read it, starts now!

“Let’s start a strategy meeting for making friends.”

This is a story about her and me. It’s the worst and the best second-life high school rom-com ever.

Love, friendship, and the sparkling joys of youth. The high school life that I’ve looked forward to- still ended with me being alone. Then, just a day before the graduation ceremony…

“Don’t die! Nanamura-kun!”

Sora Hanamitsuji, she’s a beautiful girl that even models can’t compare to. My life ended after getting hit by a truck to protect her. …That should’ve been the case.

“It must be because the gods got bored.”

However, with this accident, Hanamitsuji-san and I returned to the day of our high school’s entrance ceremony. The second high school life is no longer as charming and youthful. I was going to spend it modestly and alone. …But, she said that won’t do.

“Well, I’ll help you make friends.”

This is a story about my second high school life. It’s the worst and best teenage rom-com ever.

Ordinary office worker Oohashi Rei wakes up in the body of the protagonist of her favorite otome game, Revolution. To her delight, the first person to greet her is also her favorite character, Claire Francois–the main antagonist of the story! Now, Rei is determined to romance Claire instead of the game’s male leads. But how will her villainous lady love react to this new courtship?!

Links:
Author's Twitter: https://twitter.com/inori_narou - Tweets in English, Japanese, and Korean.
Artist's Twitter: https://twitter.com/aonoesu - Tweets only in Japanese.
Official English Novel: https://sevenseasentertainment.com/series/im-in-love-with-the-villainess-light-novel/

A girl who calls herself a devil appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under an unfair pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

A sweet cross-cultural romantic comedy tale about a lesson exchanger from a beautiful foreign country, and the young man who takes care of her dinner.
Katagiri Naomi, a high school student who lived alone for two years, finds a beautiful girl with black hair, and blue eyes, who moves into the apartment next door. The girl's name is Yui. It seemed that she really was a noblewoman, and her nickname was “Quderella” because of her nonchalant attitude at school. Naomi knows that Yui doesn't want to depend on others, but she's actually quite naive, so Naomi decides to help her.
"Today what are we having at night... Karaage chicken, huh?"
"That's right because the price of chicken is discounted today"
“I love your fried chicken so I'm really looking forward to it”

This is the beginning of a sweet and tantalizing relationship between the girl and boy who lives next door.

Meet the Evil King Valt, ruler of the Continent of Darkness. After being defeated by a group of heroes, he was reborn as a human, with his powers intact!

"I'll start over in this world. And this time the whole world will be mine!"

Valt garners the attention of the elite adventurer Iris. With Iris as his guardian, he enrolls at the Royal Adventurer Training School and immediately surpasses his seniors with his abnormal power! In an unprecedented move, this maverick is designated "level 0." He goes on to employ his talents as an Evil King to great effect, dominating the new world he finds himself in...

An elemantary schooler, Usami Kyuu encounter Ichiko, a female robot trying to learn about [heart]. What awaits the two that start to live together... Boy X Robot Girl, Begin!

From Nyan-Nyan Rampage:

"The final arc of the story begins...

When Takao Osugi receives the mysterious "Universe of the Four Gods" book from his mentor, Einosuke Okuda, he does everything to keep it away from his young daughter, Suzuno. But when disaster strikes Tokyo, can he still protect her from her fate?

Shortly after the tragic finale of Genbu Kaiden, young Suzuno Osugi's tale as the Priestess of Byakko beings to unfold!"

The high school freshman Kishino Mamoru was expecting a fateful encounter and he met the pretty girl classmate Oshii Koko, and happened to know her secret. To his surprise, he found out Oshii-san's bladder is super weak...!! To not 'leak' this secret, Kishino Mamoru swore to protect Oshii-san('s bladder).

The main character was possessed as Baeklee Yeon in the world of martial arts, the foolish and annoying daughter of Baeklee Ee-gang, a complete body and teacher who leads the male protagonist into the right path of becoming a hero.
She was killed unexpectedly, and when she opened her eyes, she regressed to her childhood days where she could undo everything.