An incomplete first volume was published in 2009. The series was finished and a complete anthology was published in 2016.

"Sex" made more familiar!

Health and physical education teacher Tsuji, who has doubts about modern sex education, attempts boldly to teach sex education to an audience of, among others, a girl who has a girlfriend, a girl who like BL, and a girl who simply likes cats.
"What is safe sex between girls?" "Positive masturbation?" "Why do sugar gliders (Petaurus breviceps) have vaginas?"
Beyond dirty jokes, but less than gravely serious, a sex education comedy!
Bright sex education begins with a heretical female teacher and female high schoolers!

Keitaro opened his front door one morning and suddenly transferred to a different world where demons and monsters live. Keitaro meets a young girl, Nia who is a half-demon. Nia urges Keitaro to "make a child" with her. Apparently, a half-demon woman can only have children with a human male...

Published in Bi-weekly Magazine, Evening for “Ore no Reiwa Project”

A humorous chronicle of the daily meeting-room problems of Yukio Tonegawa, who works as a middle manager for the whims of the evil, unreasonable business magnate Kazutaka Hyoudou.

Yuzu Okashi is a shut-in author living alone in neglected squalor. When the neighbor girl Makoto forgot her apartment key, Yuzu took her in until her mom got home. When Makoto saw the mess in Yuzu's apartment, she promised to take care of Yuzu like a mother should! (Anilist)

A group of scattered people who were friends in high school start getting killed one by one, and danger soon follows the heroine, Aihara Kumi, as she starts suspecting that one of them could be the murderer.

From MangaHelpers:
In the near future, aliens from Bluto “invade” the Earth. But what is their objective? To steal all of the timed sale groceries at rush hour and make perverted havoc among the citizens. Not the kind of aliens you would find every day. To counteract this “terrifying” enemy, a special force of heroes, “The First Star Heroes,” has been sent out wearing dynamic colors. But, out of the five heroes, two of them have a secret. Momose Kaname, a 14 year old boy who has idolized these heroes, is transformed into the team’s Pink Hero and now has to hide his identity. And “he” finds out that the Red Hero of the team is actually a girl who has experienced the same gender-bending transformation as Kaname. What will happen to these Heroes, especially Kaname, as they face all kinds of odds during their “heroic” days?

During the Interwar Period (1925-1932), Tomoji lives in the Japanese countryside while Fumiaki works as a photographer in Tokyo. One day, they meet... This story is inspired by real characters who founded later a branch of Buddhism.

Rather than having zero defence, she pretty much has -10,000!? This self-destructing lewd girl is frighteningly cute! The girl who digs her own graves & the sadistic boy who gets carried away too easily; this is a story about them messing around and their cohabitation in this love comedy!!

Kakeru, a former elite runner at high school, is chased for stealing food. He is saved by a Kansei University student Haiji, who is also a runner. Haiji persuades Kakeru to live in the old apartment 'Chikuseisou' where he plans to team up with fellow residents to enter Hakone Ekiden Marathon, one of the most prominent university races in Japan. Kakeru soon finds out that all of the residents except for Haiji and himself are complete novices.

Oono Akira, a working adult that can be found anywhere was transported to a different world while logged into a character known as the “Demon Lord” a game he manages. There he meets a child with a disabled leg and they begin to travel together, but there no way that others will leave a “demon lord” with such overwhelming strength alone. While being targeted by countries and saints that are trying to subdue the demon lord, they cause turmoil wherever they go. Demon lord on the outside, normal person on the inside, a misunderstanding type fantasy!

Yamada, Bun is a shy, quite, keep to herself kinda girl but when it comes to cooking she gets really into it and is an awesome cook. She lives alone with a talking stuffed animal named Hokusai but only she can hear him speak. Bun is fine with her life as long as she has her food and Hokusai.

Description by LuffyNoTomo

From Batoto:

Blessed with dazzling loveliness and eternal youth, Aioi Kohana is a 37-year-old virgin... yet she's trapped in the body of a loli, as if cursed!
Against her will, she is now the cult leader of her disciples, comprised of lolicons, losers, shotacons and even a middle-school student girl.

The students of Kamishiro High-School Class 2-A swore revenge on their homeroom teacher, Takao Nanami. Against her, a fake suicide had been concerted, meant to be played out by one of her students, whose actual death would later sink the class into confusion. Who soiled the water with blood? Skinned of its trust, their friendship became an urge to sate each other’s hunger.

One day, Hinako comes across a piece of raw meat. That same day, her friend Maki has a strange dream. Is that real life? Or is it a dream? A story about friendship, youth and horror.

With the rising tide of steam power and machinery, who can come close to being a Beyonder? Shrouded in the fog of history and darkness, who or what is the lurking evil that murmurs into our ears?

Waking up to be faced with a string of mysteries, Zhou Mingrui finds himself reincarnated as Klein Moretti in an alternate Victorian era world where he sees a world filled with machinery, cannons, dreadnoughts, airships, difference machines, as well as Potions, Divination, Hexes, Tarot Cards, Sealed Artifacts…

The Light continues to shine but mystery has never gone far. Follow Klein as he finds himself entangled with the Churches of the world—both orthodox and unorthodox—while he slowly develops newfound powers thanks to the Beyonder potions.

Like the corresponding tarot card, The Fool, which is numbered 0—a number of unlimited potential—this is the legend of "The Fool."

The organization known as “Gigant” has sent one of their best men to kill a cute young high school girl. However, the assassin seems reluctant… Why did he get these strange orders? What’s the secret behind that girl?

The manga is a crossover with the OREN'S manga, which artist Yanse Kazu and Takahashi launched in September 2015 in Akita Shoten's Bessatsu Young Champion magazine.

Kamiwazumi Jun lives alone in an old house with a shrine. As a result, people sometimes leave random things outside his house, like kittens... or an unconscious naked girl?! The woman in question claims to be a robot from the future who has come back in time to protect Jun, the future messiah. She has no qualms about nudity, and retrieves useful objects from a "9th dimensional pocket" between her legs. Once Jun has accepted that her story must be true, he also has to figure out how to work a sexy robot girl into his everyday life, which also includes explaining her to a cute childhood friend that has a crush on him.