From Lovesick Alley: With a famous manga artist mom and a popular captain of the basketball club brother, Aoi grew up feeling inferior. With the help of her brother, Itsuki, and her classmate who is also Itsuki’s friend, Sena, their goal is to boost Aoi’s self-confidence by trying to fall in love with shoujo manga as a reference.

In a certain place, there are two neighboring high schools. Chidori High School, a bottom-feeder boys' school where idiots gather, and Kikyo Girls' School, a well-established girls' school. Rintaro Tsumugi, a strong and quiet second year student at Chidori High School, meets Kaoruko Wakuri, a girl who comes as a customer while helping out at his family's cake shop. Rintaro feels comfortable spending time with Kaoruko, but she is a student at Kikyo Girls, a neighboring school that thoroughly dislikes Chidori High. This is the story of two people who are so close and yet so far apart.

Official Twitter (JA): https://twitter.com/kaoruhana_mp

A story of youth and sensuality. A thrilling real high school love story! High schooler Nachi Shinohara is a social butterfly. He can get along with anyone. On the other hand, there's the lone wolf, Takizawa Yuuri. A chance exchange of words leads to a relationship that no one knows about.

Reid, a young hero with the strongest physical strength, and Elria, a beautiful sage with the strongest magic prowess.

They continued to fight as rivals in opposing enemy nations, but their relationship came to an end with the sudden death of Elria… Then, a thousand years later,

Reincarnated in a world where magic reigns supreme, but he who has retained the strongest physical strength from his previous life, Reid, was reunited with Elria, who has also been reincarnated―

“Hey, Reid— I want you to marry me.”

“…Huh?”

The two, who have become the strongest unaware lovey-dovey couple in a thousand years, enrolled in the Royal Magic Academy to decide who is stronger!

Everyone wants a fresh start in high school and that applies ten fold for Toujima Asahi. She hopes that she can create a new image of coolness at Futatsuzaka High School; a school that used to be all girls until recently, which explains the female population being 5 times that of the male and the extracurricular activities being female oriented. Change isn’t as easy as Asahi thought and she is introduced to Maharu, a strong minded girl, and to Naginata, a sport similar to kendo. Asahi realizes that Naginata is what she needs in order to become a new person, as the sport allows even those who are not the most athletic to shine on a national level.

From MangaHelpers:
A young noblewoman once dreamed of becoming a magic user like in the old tales, but her time in magic school has dimmed her passion. One day, a mysterious man comes to her rescue in the forest, using magic like in the old stories. Despite the fact that he is clearly skilled in magic, he is thrilled by the idea of learning new techniques. Since the only way to do that in this day and age is in magic school, he alters his appearance to school-age and decides to accompany her back to school.

I met my childhood friend again, and she had become a beautiful and innocent girl.

"It's been a while, Hayato."
"Haruki, is it?"

In the past, I used to play in the mud with my childhood friend in the countryside, and when I saw him again, there was no trace of the bratty young man I thought he was back then. Only in front of Hayato, she threw away the coat she was wearing and reacted in the same crass way she did back then. The distance between you and me has not changed.

The Popular fluff webnovel is now in Manga form!

A very ordinary and serious high school student, Kamou-kun.
Though his days are filled with diligent study, his concern lies in his childhood friend, Katabami-san, who interferes with his studies every day. And to make matters more complicated, Katabami-san's true identity is... a fox spirit!?

The struggle between Kamou-kun, who doesn't want to be bothered, and Katabami-san, who craves attention, begins anew today!

A romantic comedy centered around "The School Prince" bringing the tense conflict of young boys and girls to the breaking point!

The long-awaited new Saki spinoff, centering around the past of Harue and the pros Hayarin, Kokaji and Noyori.

Takuma Hirose is a young, male high school student, who is blind for unknown reasons. After his mother died an unexpected death, it left a deep emotional scar on him, which caused him to become very lonely and reserved. Due to this, Takuma and his father move from the city out into a rural area and Takuma is enrolled into a new high school. At his new school, he meets several new girls, three of whom he gets to know the most out of anyone else. They are, the firm and obstinate Hayami Kohinata, the kind and obliging Hinata Kagura, and the cheerful and mysterious Otoha. As Takuma interacts with these girls, his medical condition gradually begins to heal.

Yugure Yuhi and Utatane Yasumi, two high schooler voice actresses who just happened to attend the same school and coincidentally got placed into the same class, are the two hosts of a radio weekly program. As fellow classmates and voice actresses, they show all the listeners their great friendship!

At least, on the surface.

In reality, the quiet girl Chika and the gyaru Yumiko are complete opposites. And they absolutely cannot stand each other.

Off air, chaos and insults erupt. On air, they're the best of friends. Just where will this tumultuous relationship lead them?

This is the story of Niihama Shincirou, who collapsed after being ravaged by a black company and woke up to find that he had been sent back to his second year of high school. When he wakes up, he finds himself in a time leap to his second year of high school. His high school life …… was gray and shady, but he’s sure he can start over now.
The beautiful girl of his dreams, Haruka Shijouin, whom he met again over time, is even more innocent and cute than he remembered, and above all, she has been staring straight at Niihama.

“I feel like you’ve changed a lot from the Niihama I knew yesterday. You’re still kind, but you’ve grown up, and that’s wonderful!”

If I could change the future, I would definitely save her life after she took her own life after being severely bullied. With the adult mentality and corporate power that I’ve acquired, I’m going to take my revenge on my second youth with her–!

Hino is your average high-school student. Sakuba is an amazing, talented, honor-roll student. But when Hino discovers Sakuba's secret half-demon identity, his life becomes anything but ordinary.

Description from GANMA! :
Yuusuke, a 7th grader, is interested in his friend's older sister for various reasons.
The older sister, while a little strange, is a kind and caring girl.
She's mysterious, but is popular with everyone.
This is an ordinary comedy about Mayuri-san's mysterious everyday life.

Author/Artist’s Twitter: https://twitter.com/panzuban (Though it seems they do not/have not posted much about this comic)

Hanpeita Takeichi, a samurai, finds that he has travelled through time to modern-day Japan. He's taken in by an old man who runs a cram school, and begins to work as a teacher there.

A high school student, Haro Ogawa, is a self-taught oil painter who is trying to paint the ultimate nude. After an encounter with a "witch," he sets his sights on applying to art school...? The mystery that resides in the human body, the ultimate "beauty" is painted on canvas! A skin-colored coming-of-age drama!

A poor high school boy, Izuki Tomonari, got caught up in a kidnapping attempt on Hinako Konohana, a young lady from one of Japan's largest conglomerates. On the surface, Hinako appears to be a brilliant and beautiful young woman, but in reality, she is a lazy girl with no life skills. However, due to family reasons, Hinako has to play the role of the "perfect young lady" at school. Wanting to protect her, Izuki took on the job of caring for her. Eventually, Hinako began to spoil Izuki with all her might. "I don't want... Izuki to leave my side right now." This is a love story that begins beyond the master-servant relationship featuring a princess with a beautiful facade.

With the only thing she inherited from her parents being their once-great family name, the poverty-stricken Reiko Kujouin jumped at the chance for a scholarship to attend a prestigious school known called Meisei Private Academy. Why? Because of the ¥50,000 per month allowance and all her school supplies being paid for, of course!

But little could she expect that, on her very first day of classes, she would be tackled from behind by another girl who, convinced that she's been reincarnated into the world of an otome game, accuses Reiko of being a wealthy villainess...!

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/