From Ikemen Manga:

A fun romantic comedy revolving around Wada Erina, a high school girl who absolutely adores cats, and her classmate, Nekoyama Akira, who is unsociable and always wears a mask. Erina is usually nicknamed "Queen" by her classmates due to her cool appearance but when she talks about cats, she gets extremely excited.

One day, a cat visits her yard. Lured by it’s cuteness, she gets excited and kisses the cat, and then...?!

While pursuing a criminal, the pretty but reckless interplanetary police officer Birdy Cephon Altera accidentally kills Tsutomu, an Earthling high school student. To make amends, Birdy is forced to share her own body with Tsutomu's spirit so that he can continue his own life.

At first, Tsutomu knows nothing about his situation, but he soon discovers that his body is starting to take certain actions without his mind ordering it. In times of action, Birdy takes full control of their shared body, transforming it back into her original female form.

NOTE: Volume 1 came out 7/1996 and was never finished. A second series was published under the manga title ＶＳ版　鉄腕バーディー for 2 volumes. This second series came out 12/1996.

A crazy manga about Minako, a young and beautiful woman living alone with her cat, Moeko. And ahegao. There's also ahegao.

Even though he’s such a good-for-nothing…
Why is my heart racing like this!?

Hazuki Umi is a caring middle school student, beloved by everyone who lives on the island.
In contrast, Inoue Fuuta has done nothing but be lazy at home ever since he moved to the island to open up a guesthouse.
An overwhelming age difference of 15 years lies between them.
He has no delicacy, he isn’t reliable at all…
And yet, his words always manage to make her heart race, her face flush---

The age-gap romance between a pure middle school girl and a boring 30-year old man begins now!

A twitter short by @hamita1220

The various, daily life of the female student who hates love, Han Yeonsil. A romcom you can relate to!

Three days dragon flight from the nearest town, deep, deep in the forest, then deeper still, lives a 'witch'. Nina the witch, also called "The world's strongest witch". Visiting her is the apprentice, Iris.
This is the record of the witch and her apprentice's peaceful days, in a remote forest that breathes illusions and magic.

From MangaHelpers:

19-year-old Roji Shizuru has a crush on a fellow university student, Nana, but there always seems to be complications when he tries to get closer to her. For one thing, he's afraid his hot friend Tachibana Masaki will steal her. Beyond that, the main complication comes from the interference of children, specifically one odd child called Maida Kokoro, who keeps clinging to Shizuru and calling him 'mama.'

Eitoku Academy has a legacy of being a school for the ultimate elite, the best of the best. And the most rich and powerful students there have formed the Correct 5 clique to maintain the integrity of their school. Unfortunately, new student Oto Edogawa doesn’t have the pedigreed background of her peers and has to work part-time jobs to help make ends meet. Will a chance encounter with Haruto Kaguragi, the leader of the Correct 5, put everything at risk?

There are many students at Iojaku Private Girls School who have eccentric personalities. From the girl who is overly attentive to matters regarding public morals to the point she would kneel and stare straight into the crotch of a man who is pants down on the toilet, to the delusional girl who loves her teacher way too much and often has lewd daydreams about him in school, as well as the girl who's a self-proclaimed sadist. Then there's the teacher who watches over them, an iron wall that remains unperturbed by the perverted happenings around him. (Source: Mangaupdates)

Links:
Bookwalker Separate Chapters: https://bookwalker.jp/series/239081/list/
eBookJapan Separate Chapters: https://ebookjapan.yahoo.co.jp/books/580063/

A group of young girls possess a mysterious power known as “Alice’s Dream,” which gives them the ability to turn their thoughts into reality. Detained and experimented upon, these youths are locked away in secret until one of them manages to escape. Her name is Sana—a girl with the power to ignore the very laws of physics. When this willful powerhouse crosses paths with a stubborn old man named Zoroku, his carefully-ordered life will never be the same again!

“What the hell are you doing, me?”
Already half of his high school life is over and none of his hopes and dreams have been fulfilled yet…
This is how Yuuhi Nagi, who has no friends in his classes, has been living his uneventful empty life – until he got dragged into this unexpected crisis!
This is how the lives of the four people who are most likely to repeat a year, and the person who will help them succeed, are connected.
This is where this bittersweet coming of age story begins!!

On one rainy day, she had picked something that looked like a dog...Let's see how tricky dog it can be...

An "after 100 days" side story to the original "A Story About Wanting to Commit Suicide, but It's Scary So I Find a Yandere Girl to Kill Me, but It Doesn't Work".

Traps have existed since time immemorial; a fact that Chiroda Taishi laments, as he seems to have both an affinity and an aversion to being trapped.

When Natsuno Hanabi went back to her hometown to study in high school, she thought that she will have a new wonderful life. But Tachibanakan, the dormitory she was going to live in, was not what she expected.

Once before, Seven mythical Gods appeared on Earth and their battle split the earth and tore the sky. 10 years after the battle, the calamity should have passed already. However. A boy named Shinsen Raika had his true little sister abducted by a god in the battle and was currently standing in the『Academy』on an artificial island in the distant seas.Here, the night was called as after school time.
During that time period, the 『Gods’ Proxy War』 were being held by using Divinity-Compatible people for gaining the seat of the law of world.
On the first night, Raika was attacked by the Norse mythological God Brynhildr. With death in front of him, he acquired the detestable power of the gods; the power for revenge. Absolute Domination. Using the power from the devil eye of Balor, he tries to take back the world from Gods control.

Natsuaki has a crush on his classmate Nashida, if only he could just come out and say it! An unrequited love comedy between the inscrutable Natsuaki-kun and the unaware Nashida-san.

Lee Jaekyung, a violent girl, just wants to live a peaceful and normal high school life. She goes to the same high school that her crush, Yu Minwoo attends, and even learned to sew and cook just for him. She finally sees him again when he gives his student body president speech, but she also finds out that the annoying playboy Sejoon Kang, is also at her school. How does Jaekyung know Sejoon? What will happen next?

Shirakaba Yuki is a girl with the Catulus syndrome, which afflicts her with cat ears and a tail, plus some behavior like a cat. In the middle of her high school entrance ceremony, Ayano Riko - who is also a first year - comes in with a mountain of cats on her back. Apparently she's a cat magnet.

They become friends.