From mangaupdates:

Born into a wealthy family, she lost her mother at a young age.
She is Riona, a girl who was raised by a single father.
At the girls' school she attends, she has many friends and a special partner of hers,
She lives feeling a little lonely that her busy father has just left her house.

One day, her father bought a robot that she said was her "housemaid"
She witnessed the act of "Forty"...?

A girl who wants her affection and a robot who doesn't know her feelings.
A dramatic story of gems!

Without a single friend, middle schooler Chigawa Kon lives on a small island and laments that she hasn't "fallen in love" yet, unlike her classmates. She often plays by "the Hole", a cave near the sea where a man-eating monster lives, according to folk tales.

One day, as she meets with another girl who accidentally drops her smartphone in the sea, they fall from a cliff together but miraculously survive. It turns out Furuka is also all alone.

I, Yvonne, reincarnated into an otome game as the rich villainess. According to the game's plot, a character loathed by everyone such as myself has the main role of bullying the heroine, pushing her towards the various love interests' romantic routes. But it seems like there's something wrong with Elsa, the heroine! She's getting too close to me!

Note: The translation of the original web novel can be found here: https://dynasty-scans.com/series/please_bully_me_miss_villainess_novel_ver

Koumoto Umi, a normal high school girl, falls in love with the pretty girl from the class next door, Segawa Shou. Even though she feels overwhelmed by her feelings, she can’t help but want to get closer to the mysterious Shou.

A popular Twitter shorts series depicting the love story between a gyaru and her classmate who she mistakes as a guy outside of school, bonding over their mutual love for rock music.

Nagisa Ootsuki shed her former self out of shame from failing her highschool entrance exams. On her first day in her new highschool, who does she meet but the girl who made her fail the exam! How does Nagisa deal with these complicated emotions?

Author's twitter: https://twitter.com/sakuragi_ren

Kurumi Yoshizawa, the student council president, has excellent grades and an inviting, friendly personality… on the surface at least. In reality, her days are spent struggling against her domineering mother and agonizing over her teachers’ expectations.

One day, Kurumi reluctantly goes to meet Naoi, her truant classmate, at her homeroom teacher’s request to look after her. The situation sours quickly as Naoi sees through Kurumi’s facade and makes her animosity clear. On the verge of a meltdown, Kurumi is barely able to stop herself from shoplifting, unaware that she’s being recorded by Naoi…

This is a violent story about two young girls struggling every day with no escape.

Naruse Soushi is a 38-year-old political secretary. One day, he is caught in a car accident, and his vehicle is swept to the bottom of the sea - with himself in it.

At the same time, in a completely different world, a princess named Reina is caught after her kingdom is taken over by another country. Her retainer, with no other options left, decides to save her soul by taking it out of her body. Searching for another soul to replace it, she chooses Naruse’s.

And so Naruse - now in princess Reina’s body - is taken prisoner and sold to a lesbian brothel. Taking up the name Lillion, our protagonist decides to embrace being a prostitute and rise through the ranks, to both attain a more comfortable experience as well as figure out the mystery behind Reina’s past.

Sakura Minori is just a very average girl.
Yet despite being the only commoner in her school, could it be that she's actually become popular among the young ladies she so admired...!?
A girls-only lovey-dovey comedy♪

Miyako is a super-shy girl in college. One day, her younger sister brings home a super-cute girl named Hana, and Miyako totally falls for her! These are her misadventures in trying to awkwardly get closer to Hana.

The club room of the defunct Tea Ceremony Club has been taken over by a 4-person group calling themselves "The Amusement Club". A full-bodied comedy, overflowing with love, it's guaranteed to give you the energy to live healthily and heartily for tomorrow.

*Contains the story Hearts Melting Together in vol. 2.

When Miyanaga Saki was a child, she would always lose her New Year’s money during her family's mahjong games. If she won, her family would be upset, and if she lost, well, she lost. As a result, she’s learned to play in such a way that her score always remains plus/minus zero: not good enough to finish first, but not bad enough to finish last.

Now a high school student, Saki dislikes mahjong and avoids it. Until one day a friend drags her to the school's mahjong club, where her hands touch the tiles once again...

Himari fell in love with the band and Sakura at the new student welcome party when the band performed.
Himari talked to Sakura, and she fell in love with her smile.

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.

Hime is a girl who has developed her cuteness as a deliberate act with the plan of marrying a billionaire. One day she is more or less forced to work as a replacement for a girl injured by bumping into her in the street. The place of work is a concept cafe where the waitresses put on a show as though the cafe were run by the yuri cliche ojousama school. There's a large contrast between the performances and the off-duty staff.

The story is set in the modern world, but there exist doors that can take people to the "other side," where strange urban legends and internet stories prove to be true. College student Sorawo Kamikoshi finds herself exploring one of these doors, and almost dies on the other side, when she is rescued by another girl named Toriko Nishina. Toriko is mysterious girl, but very skilled with a gun, and she seems to be searching for someone else on the other side. Together, both girls start to explore these doors to the other side.

"You... are going to die tomorrow."

Minadzuki Satsuki, 16 years old. Apart from being antisocial and declaring the death of her classmates, she is a normal high school second-year student. Her nickname is "Liar Satsuki".

However, her eyes alone are abnormal. What she is gazing at is...

Twitter of the author : https://twitter.com/ryo_ichips

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 spin-off of the Yuru Yuri series featuring Sakurako and her sisters.

Super rich ojousama, Aiu Eiko is passionately in love with her classmate, Nagi Nagisa. The daily life of a little weird high school girl.