From Tarot Cafe:

"Why is my life so messed up?!"

Haeun has a step brother who's a gang leader and she gets blamed for everything he does. When her brother makes it so that she is late for class, she has a strange encounter- the encounter that makes her a housemaid for the rest of the year. Haeun, who hasn't even had her first kiss yet, decides to take revenge. But when she finally kisses someone -and it isn't pleasant- what will happen?

Kaori Fujimiya is always alone because all of her happy memories, including time spent with her friends, disappear every Monday. Deciding that he wants to be friends with her anyway, Yuuki Hase tries to get close to Kaori each week, wishing that she would one day call him “a friend”.

The world is split into two kinds of people: those on the "inside" of EDEN, and those on the "outside". Within EDEN there is clean air and water - it lived up to it's name of a true paradise. But EDEN cannot contain all of the people of the world. EDEN actually made conditions worse for those outside. Because of this, many resistance groups have been formed. Ricalna Forde is a soldier of the resistance team COSMOS, whose mission is to infiltrate EDEN's main headquarters and destroy the "Central CPU" - that controls all of EDEN.

A spiral love story. Kouno Jun is a lively character who lives life with all his might. In kindergarten, he falls in love with Hasebe Rino, the most beautiful girl in his class, and he confesses to her. Hasebe accepts his love, but the moment she gives her answer, she vanishes on the spot. Failing to figure out what's going on, Kouno asks his friends about Hasebe, only to find out that no one remembers a single thing about her. She has just vanished, along with all memories about her, except for those of Kouno.
While Kouno leads a weary and desperate high-school life, Hasebe appears again as a transfer student. However, this Hasebe is not exactly the Hasebe he knows.

Ichinose is a boy who all his life he was bullied, he has this ability to see ghosts and one day he meets a dog that is trying to tell him something, One day he meets Shiranui, Senka, who is a Ghost Child, a child who can see ghosts and fight them to purify them. Ichinose decides to help Shiranui out to fulfill her wish.

A boy wakes up in a strange room and finds a girl passed out with him. They find out they both have weird collars on. The boy has a phone which seems to be connected to the people behind this. They want them to do what?

The "mysterious school comedy" centers on the unusual members of a high-school literary club. Touko Amano, a high-school senior who calls herself the "literary girl" as the club president, is actually a supernatural creature (youkai) that devours stories — she tears pages from books to munch on them. Her club subordinate is Konoha Inoue, a second-year high-school boy who writes stories every day for Amano to eat. He once wrote an award-winning novel, but he wrote it under the penname Miu Inoue so readers thought the author was a mysterious 14-year-old bishoujo novelist. The stress from the novel's fame and its movie and television drama plans turned Inoue into an introverted recluse.

After her normal, happy life shatters, Tokiko and her father move to a small seaside town to live with her grandmother as sixth grade starts. There, the sound of the waves brings back a distant memory from when she visited seven years ago, a memory of almost drowning in the sea and being saved by a merman. Are there really mermaids in that sea? Tokiko adjusts to her new life in the small town as she holds out hope of once more meeting the merman who saved her.

1) Passion Kiss (Yokujou Kisu One night) -
Manatsu has a dream of an incredibly fulfilling kiss. "Who was the boy in my dream? That's the first time a kiss has made my chest ache." That's when Manatsu gets a feeling from her classmate, Morishima-kun -- the same feeling she got from the boy in the dream. Without thinking, and despite the fact she already has a boyfriend, she... (!!!)

2) Second Virgins (Sekando Vaajinzu) -
Kawori is prepped and ready to lose her virginity to Shunsuke... until he penetrates her and it hurts like hell. She wants him to stop, but he can't. They get into a fight and stop talking after that. Then, one and a half years later, Kawori gets coerced into attending a singles party -- and Shunsuke is there! ...As the boyfriend of Kawori's friend Nao? How will Kawori and Shunsuke handle their unresolved feelings?

3) Eternal Summer, Fleeting Summer (Eien no Natsu, Isshun no Natsu) -
The first love letter Takeshita Riho wrote was to Sakurai Touma, the class president she had a crush on from second to sixth grade, but the letter never got sent. ...Until now, when Riho's meddlesome friend mails it out. To Riho's surprise, Touma writes back and responds well to her feelings! He's just as Riho remembers him, and the way he writes makes it sound like those elementary school days were the most important of his life. What Riho doesn't realize is the heart-breaking (and tear-jerking) reason why...

The story centers around the film crew for Idol Survival, the internationally popular television program where swimsuited idols compete in games. The crew arrives on the same isolated South American island that TerraSave member Claire Redfield is visiting on an investigation.

From AtoZ:
School will bring a fresh start and a way to break free from her seemingly cursed fate. Disaster strikes before she even arrives for her first day at school and a most embarrassing secret is discovered by Chun Hyuk, an aspiring band vocalist who loves only money and music. Can Yu Goon Goon and her best friend, Da-Jung, find a way to shut the mouths of Chun Hyuk and his fellow band members before her high school life is ruined? Da Jung wants to make a deal with the guys but how high a price are the girls willing to pay?

An ugly rumour breaks Rae and Suura apart, will they come back together? How? A completed project, compiled of nine acts, by mangaka Kawachi Yukari.

In this world, every child is born under a god. Some gods are weaker than others. Some gods are stronger than others.

Children born under weaker gods become defunct in society, and cannot attend high school. Instead, they must get jobs after middle school. High school in this world is a place that trains students to use their stronger gods. They have one thing in common: They can grant wishes if the correct price is paid.

Leerang turns back time a day, and pays dearly for it. To reverse his wish, he must attend high school and try to use the powers of his cat god once again.

A long time ago in a galaxy far, far away.
It is a period of civil war. Rebel spaceships, striking from a hidden base, have won their first victory against the evil Galactic Empire. During the battle, Rebel spies managed to steal secret plans to the Empire's ultimate weapon, the DEATH STAR, an armored space station with enough power to destroy an entire planet.
Pursued by the Empire's sinister agents, Princess Leia races home aboard her starship, custodian of the stolen plans that can save her people and restore freedom to the galaxy.

Three boys in junior-high who cross-dress because of differing reasons meet each other through a cross-dressing community website, and decide to meet up in real life. "Parou" started cross-dressing because he wanted to attract a heterosexual boy he liked. "Marika" is transgender and identifies as female. Lastly, "Yui" is an antagonistic boy who adopted the persona of his older sister after her death. In contrast to Parou and Marika, Yui is sorely disappointed at the meeting.

From LINE Webtoon:

Sometimes we just can't get out of a ditch; yet we still hope.

From Rosa Negra:
A plain high-school girl, Sun-Nam Bae.
She wanted to be free for once in her life, and decided to rebel. But the result of such rebellion.... being a mom?
"Who the heck are you? Where did a ugly pumpkin like this roll in from? You think I was born a man, just to live with a ugly girl like you?"
Bravely standing her ground against a spoiled young master, Chun-Doong Mah, with her child. Chun-Doong and Sun-Nam's tumultuous diary of raising a child.

"Hard working" or "passionate" was not in Sakurai's vocabulary and joining a team sports in school was out of the question. But one day, he accidentally walks in on his female classmate Toyoguchi naked in the locker room and in return for keeping it a secret from everyone else, he is forced to become the manager for the female lacrosse team. Toyoguchi is passionate about lacrosse and was responsible for creating the team for the school. Sakurai reluctantly begins his role as manager but is slowly drawn into Toyoguchi's personality and begins researching and enjoying the sport. The once lazy Sakurai who was scared of failure now learns to put himself out there and put serious effort into something worthwhile.

Fushimi is a high-school student who also aspires to be a mangaka. Rin is a model who appears to have some type of psychic powers. What will happen when these two cross paths?

Saitou Shinji is an Ordinary High-School Student living a peaceful life on a peaceful island… way too peaceful for his tastes. The only two things he enjoys on the island are the pranks he plays and the time spent with his Childhood Friend Kana, a cheerful girl who loves taking photos and understands Shinji better than anyone.

However, when he runs away after an incident where he got angry and punched several classmates in the face, he receives a mysterious e-mail on his cellphone: "If you answer this e-mail, you too can become an invisible man!" He answers it while laughing it off… but the day after, everyone has inexplicably forgotten about the incident, and a mysterious white-haired girl appears before Shinji, calling herself an "invisible woman." He soon realizes that answering this e-mail may take away from him the only thing he holds dear…