The story follows the crazy misadventures of Kaizo Katsu, a former child prodigy turned weirdo after his female childhood friend, Umi, kicked him off a jungle gym in the playground, and he got a huge bump in the head. With this set up, Kaizo (believes he is a cyborg) and his classmates, Umi (will go revealing her dark side with every chapter), Suzu, and Chitan (an inferior being?), will treat in every chapter a different topic of life with the hilarious and interesting way of thinking of the author Kumeta. The attacks of different geniuses/weirdos will create a lot of funny situations.

Included is a story called Yuuryoubukken Chuukaishimasu (A Brooding, Gloomy Property) in Vol. 13: A young man moves from his hometown to Tokyo to attend university there and looks for cheap accommodation. He does indeed find something, but what is the non-monetary price for this?

Shimizu Kenta's high school life changed when he was seduced by Aoi Riku as a joke who then proceeded to bully him mercilessly. However, a messenger from hell named Beatrice came and gave him a choker so that he can dominate sinful women as an executor.

The seasons have changed and it will soon be the second spring. Tatsuya and Miyuki have finished their first year at First Magic High School and are on their spring break. The two go to their villa on the Ogasawara Island archipelago. After only a small moment of peace a lone young woman named Kokoa appears before them. She has abandoned the Naval base and she tells Tatsuya her one wish.

From MangaHelpers:
In high school, Maki Eiji was a delinquent, often skipping class and getting into fights. One girl, Chino Kotoha, was kind to him, until she was targeted by delinquents due to their apparent relationship. Suffering their attack seemed to have permanently changed her for the worse.
Years later, when Eiji sees her again, he is overcome with guilt and regret. To his surprise, a mysterious scantily-clad woman suddenly appears, claiming she can send him back in time to make everything right! He takes her up on the offer, but things are not as simple as they may have seemed back then. It turns out that Kotoha had her own painful secrets in those days, and Eiji may not be the only one traveling in time to change the past.

Touya, a boy whose face was too scary, was enthusiastic about Inami-san, the most popular girl in the school, But she had a dark side....!!

Kitami Suguru is a delinquent glasses boy at KY, who gets himself involved with a fight and ends up getting saved by Tamaki Kanae, and she ends up following him. And she notices that he's actually a handsome guy when he doesn't wear glasses!!? Besides that, Kitami will slowly repay her and do whatever she says! Kanae's motto to calmly spend her high school life is going into chaos!!?

Yoseob, normally very quiet and composed, is in the police station convicted of stabbing 8 civilians with a knife. Everyone's wondering whether he actually committed the crime. Does he, a mere high-schooler, really have any reason to have done such a horrifying act? Does his obsessive love for his older brother, Jaeha, have something to do with it?

The protagonist is Shiraishi Atoi, who hasn't been able to communicate well with others and hasn't made any friends. After entering high school, he enters a special class at a rural school. But instead of being a normal class, it's full of unusual classmates. A story full of fluff!

Ajafuji Sara transferred to the private Fujigamine Academy. She suffers from extreme blushing and dreamed of making friends at the academy and having an "ordinary student life". However, having met at the scene, Kazari Iris set her eyes on her. Will her dream crumble away?

Hiratsuka-sensei not being able to get married is wrong as expected!

Follow the chemistry between Hachiman and Hiratsuka-sensei in this Oregairu doujin by Twitter user @poipoipoita.

Despite her clumsiness, teenage school girl Chihiro is popular at her school, especially with the boys. She joined the wrestling club a few months back and has been practicing without much apparent success. However, she wins her first competition surprising everyone including herself and her fan boys become more passionate about her. Will Chihiro be able to become an amazing wrestler?

The main character, Kaede Futami, has a premonition that her childhood friend, Ryo Ichimiya, who she has feelings for, will confess his love to her on the day of the fireworks display coming up in two weeks. However, she can't be honest in front of him and behaves carelessly, which makes it difficult for him to get closer to her. And if the dream doesn't come true, she will lose her precognitive powers. Will she be able to go to the fireworks display with him and confess her love as she dreamed?

Based on the web novel that inspired the popular song あの夢をなぞって (ano yume wo nazotte) by YOASOBI.

Yilin bumps into the tomboy Rouxi, sparking an interest between each other that slowly blooms.

Honori joined the suspicious-fun club, the "Substitute Club", which substitutes for people and does their work for them. The members of this handy-man type club are very free-willed and loyal to their desires.

Sakura, a 1st-year student at a music high school, loves playing piano. She also quietly loves her friend, Nanoha. Nanoha has adored listening to Sakura play the piano ever since they were children. As the yearly music competition for upperclassmen comes around, Sakura will have to deal with her passion for both the piano and Nanoha.

Nakagawa Hinata, an ordinary high-school student, is arranged to marry Joumori Zen, a rich heir. The engagement was arranged by her grandfather.

When the time came to meet her future husband, she found that he is the complete opposite of how her grandfather described him to her! Now, what do you think will happen in Hinata's life?

When the daughter of the Takato family, Ichigo, returns from studying in the UK after a year, she notices a strange situation in her family. Apparently, they all seem to have been brainwashed by the butler, Seijuurou Kuki, who came while Ichigo was abroad. And so begins her efforts to return her family back to normal while desperately resisting Kuki's influence.

The main character, Leon, was abandoned to the world of demons right after he was born because of his lack of magical power. However, his fate changes completely when the Four Heavenly Kings of the Demon King’s Army pick him up. The Four Heavenly Kings were the strongest and most powerful figures in the world had trained him personally and took good care of him. As time passed, the boy became a magnificent soldier of the Demon King’s army with the power to “rule” every kind of magic. Leon has been given a new mission to protect Alicia, who will enroll in a magic academy on the island called “Paradise Island.”

A demon named Shion came to the human realm because of a trial that will decide who'll be the king of the underworld. However what he needs to do to prove himself worthy of such title may prove to be too difficult for Shion...?!

Chika and Masaomi are childhood friends, both raised by single parents, and Chika would often spend time at Masaomi's house. When Chika's mother died in an accident, Chika would have to move away to live with distant relatives, leaving Masaomi and everything behind. Instead Masaomi proposed, "You should marry me. Husband and wife. For real."

"So that means..."

"Kissing, making love, everything. Can you?"

Chika's answer is...