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...?!

From Entropy:

Jin Young is a good student with good grades, but she has a little bit of an unstable mind. Hye Jung is a cheerful girl who helps out at her mom's "snack shop", a sort of small restaurant that offers light meals to diners. Both attended the same school, and both transferred to an independent-study private school, where they meet Si Hyung who is an instructor there. Si Hyung used to live in the same neighborhood with Jin Young when they were young, but he's surprised how Jin Young has changed into a cold person.

Once upon a time, there was a mountain with a temple on it.Two priests lived inside the temple.They didn’t live there as part of their credo, but in order to eat people.

The story follows the everyday lives of Daikichi, an elderly man, and his pet cat, Tama. Daikichi has lived his entire life in a small island town, and although young people have begun moving there and the landscape and scenery have begun to change, the one thing that remains constant is Daikichi.

The grandson of a commissioner absconds and forces a police officer to take him in.

An ex-couple meets again for a single day after a year to bury the boyfriend's cat. A short story.

A 2-page oneshot about Dowman's cat. Appeared in Manga Club magazine 2014年3月号

Two quick pages in which Dowman teaches you a little bit about cats and how they relate to gravity.

- thetsuuyaku

After the loss of his loyal dog, Winter, Ji Seungwoo is wounded by an irreplaceable loss and sadness of his 22 year-long companionship. But one day he finds an adorable little kitten waiting in a cardboard box next to his front door. Being the gentle and kind-hearted man he was, he decides to bring him home. However, upon waking up the next morning he is no longer in bed with a cute baby kitten, but a grown, handsome man?! “I am this person’s owner!” he says! Stay tuned to watch how Seungwoo and Mr. Cat’s relationship develops…!

A web-comic collection of very short stories centered around a girl, her cat and her car.

N/A

In Cat Shit One '80, the story continues to follow the three protagonists as they became involved in various low intensity conflicts in the 1980s. Perky, now a member of Delta Force, is attached to the Special Air Service and is involved in various SAS operations while Rats and Bota are now involved with the U.S. operation in Afghanistan against the Soviets.

From Condensation:
The story centers around Keito Aoyama, a former famous child actor. Due to a childhood incident, she retired from her career early and withdrew from normal society. Now 16, she passes her days in boredom and without purpose. But one day she runs into a stranger who takes her to El Liston--a free school for high school students like herself, who don't have a place where they belong. Though hesitant at first, Keito decides to enter El Liston and subsequently, she begins a new stage in her life. With the help of her only remaining childhood friend, Taiyou, and her new classmates Rei, Momiji, and Kouichi, Keito slowly finds the courage to open up to others and to accept their support. Will Keito return to acting? Will she find true friends? Love?

4-Koma involving cats as historical figures.

Kang Ha Ji was a lovable, friendly girl who fell victim of bullying by the school's most popular girl because of her childhood friend Hong Min-Joo. Then one rainy day after an attempt to save a black cat from jumping into the road. She fell through a dimension crack and was transported to Cat's Kingdom.
"Did I found myself in a situation that's waaaay over my head because I met the Prince of this Kingdom?"

Fantasy Romance manhwa of an adorable cat's Bride.

This is a story about three sisters in search of their lost father, who was a famous artist. They steal his works of art from museums/galleries to make him recognize their presence in the world. The three sisters' gang is called Cat's Eye, and so is the coffee shop they own. This coffee shop is located right in front of the police-headquarters. Hitomi, the middle sister, is betrothed to the police inspector Toshio.

"30,000 residents of the Northern Kelko plains were vaporized by the Kiyania bioweapon sprayed by the terrorist group Echiboza. 30,000 cats remained in their place. However, one person escaped this fate; a girl saved by a stranger with a gas mask.

Her name: Kaka Hollen."

In this strange new world, terrorism, crime, and corruption have found a new target in the feline kind. Enter counter-terrorism squad 'Green' and their all-purpose humanoid weapons, the 'OB's! But what role will Kaka play in midst of all this?

The story of a girl who misses her cat, and how she lures a cat-girl to her apartment.

Paris, 2007 Anahë, 23 year old girl, is set for a year to make herself known as a painter. It occupies her free time in the museums of the capital and Metal concerts. During one of her outings, she meets the musicians of Katacombes who initiate the discovery of underground Paris … But for Anahë, something goes wrong in the first installment. A mysterious event occurs in the catacombs and a member of the group disappears … The next day, the fear reigns within the adventurers who do not remember anything, and are forced to note the absence of their companion. Anahë then decides to start looking alone for the missing man …

For the sake of saving her most precious person, the fourteen-year-old girl Ai Wen enters a time machine. However, before she knows it, she has accidentally travelled to the future! There, she meets Ulysses and many other previously unimaginable characters......

One day, I woke up to find that my cat has become a human!A new day with catboy.Original Webcomic: http://www.foxtoon.com/comic/catboy_catday/