Zaizen Takashi passes his entrance exams at the top of the heap, and starts his first year in junior high school at Dojuku Gakuen, a 130-year old, highly advanced institute of higher education. The day after the entrance ceremony, "the secret" of the school is revealed to him, which concerns the existence of an "investment club," consisting only of the top student from each of the 6 grades.

Its club members have a mission. They must invest from a capital of 300-billion yen and yield a profit of 8%, which is their annual goal. This is why Dojuku Gakuen, boasting the highest standards of education in all of Japan, is tuition free.

This world had rules. Rules that weren't meant to be broken. If only we had known those rules, everything could have been avoided...

From LINE Webtoon:

At the first day of his school, Gamin saw something that he shouldn't have seen and from that day, his previously witch-less life became double double toiled and troubled.

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Hyun-Su Jung (29) was scammed by Jung-Mi Kim and is now in debt of 900,000$. He is being chased by loan sharks and ended up kidnapping Jung-Mi Kim's daughter, Ha-Yeon Lee (17). But when Hyun-Su Jung calls to demand ransom, Jung-Mi Kim tells him she doesn't care about what happens to her daughter and hangs up. What will happen to the kidnapper and his victim?

From Easy Going Scans:

Sui and Sou are a pair of twins who are starting high school. Though raised by occultist parents, they were supposed to have a very normal high school life. However, once they arrived at campus they not only encountered werewolves but also vampires and even sorcerers! As more strange people appear one by one, will the twins' secret be uncovered?

From Easy Going Scans:
The story of a boy and girl whose lives were one day entwined by red string. Literally.

From Easy Going Scans

What happens when you take a good, long look and realize that your boyfriend is prettier that you? And what happens when you go to a high school with so few girls that you're considered a goddess? But then again, your pretty boyfriend is also attending the same school...

Takahara Jin is a former delinquent in a biker gang. Every day from the day of his entrance ceremony in high school various problems occur that can make him be expelled but from these problems, the power of his arm is noticed and in exchange for not being expelled he must join the baseball club. This series follows Jin as he looks away from his past and gives baseball his all.

From Yen Press:
Yuki Nagato, the shy president of the literature club, has never been very sure of herself around other people. But around Kyon, the only boy in the tiny, three-person club, Yuki finds herself faltering even more than usual. For Kyon, and for her precious club, Yuki must find her confidence and let her true personality shine! Enjoy taking a fresh look at your favorite characters in this brand-new story set in the world of The Disappearance of Haruhi Suzumiya.

From Twisted Mist Scans:

A total of 5 one shots:

1) Ore no Suki na Ko ga Burakon Sugiru!!
Okano Shuu has a crush on Ogata Saeka for 10 years, who has a brother complex. She is always sticking closely with her brother, Ogata Eiji. And this trio are childhood friends. Shuu tries to make Saeka realize him.

2) Amakute Okashi na Sugar Love
Yuko loves wagashi (some type of sweet), and a popular boy at her school, Tsugumi, which happens to be a wagashi maker! Ever since her discovery, she has been a regular at his shop to have her beloved wagashi and to see Tsugumi. However, it seems that his shop has suddenly gained popularity, making Yuko jealous...

3) Chouko to Ippon Shoubu na no da!

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Inugami Tsubaki is the perfect girl and has her future perfectly planned: she's beautiful, smart, skilled in sports and loved by everyone. As the future head of the most powerful financial clan of Japan, it seems nothing can stop her. However, in her first day of high school, she meets Sarutobi Sanosuke, a wicked guy who outsmarts her and quickly becomes her enemy - what's going to happen between them?

From etc:
Ran's dream is to meet a prince, one of those you see in fairy tales. After several years Ukyo is back... to become her prince? With Ran living in her own fairy tale world and Ukyo not able to express his feelings and thus bullying her, how will this couple work?

This is a spin off story that occurs about three years before Spiral. One of the main characters is Imari, who is in love with the kid who wants to be a detective, and which also quit school running after Kiyotaka, and it seems he's dating a murderer without knowing it...? But how is it all connected to the blade children? Not long after, our favorite blade children from Spiral appear for the rescue, all manipulated by Kiyotaka.

The summer vacation...with a teacher in a vacant classroom. It is a sweet painful love affair that a girl often (o rly?) experiences. This is the sixth issue of the best-selling Cheese selection. Nine other stories are included besides the title story written by Sugi Emiko.

Nanami Rei has always lived his life in his brother's shadow. He can't talk to girls, he's not athletic, and his grades aren't good. On the contrary, his brother Ren is smart and popular, but he has never judged Rei for his faults or lifestyle. One day, Ren goes into shock and mentions to Rei the name, "Wonder Rabbit Girl". Rei, seeking to find this mysterious figure, attends Ren's school, disguised as Ren himself.
Rei comes into possession of his brother's USB drive, which contains a list of the school's girls and their fetishes. Rei believes that one of these girls must be the Wonder Rabbit Girl.

From Batoto:

Masumasu Academy, an Academic City floating in the Pacific, is home to children with mysterious powers known as "Fiction". "Fiction" grants them enhanced physical prowess, as well as one additional ability. What will happen when a time stopper, Kazuma, meets a cute girl with the ability to move at lightspeed, who knows and is searching for him?

From Jcafe24: Corpse Party: Blood Covered is about a group of high school friends in Kisaragi Academy. Kisaragi Academy was built on the grounds of Tenjin Elementary School, which was demolished after a string of disappearances and gruesome murders. After a mysterious earthquake, the students find themselves trapped in an alternate reality Tenjin Elementary School, where the murders of others trapped before them have continued unabated...

From MangaHelpers:
This is a story of a group of college-age people who struggle with gender and sexual identity.
Yuki (nicknamed Yoshiki) is a girl, but she is terrible at 'being feminine.' She mostly dresses like a boy and is often mistaken as one. However, she has to wear a skirt and imagine being dominated by a guy in order to masturbate. Nagao Mikako seems young and innocent, and she uses that apparent innocence to sell her body as a fake 15-year-old. She knows her youthfulness can't last forever, but she enjoys tricking the men. Her friends have no idea of her sexual habits and believe her to be sweet and sheltered. Aiba Kaito is a pretty good-looking guy, but he wants to be Nagao Mikako. He often dresses as a girl, picking out clothes that mimic Mikako's style. Though he's into cross-dressing, he is still attracted to women. Will these young adults and their friends be able to handle their 'guilty secrets' and muddle their way through this confusing period of their lives?