Mikai Yui is a high school girl detective... sort of! She's already 19, but she's on her third repeat of the final year of high school. It seems like people get murdered around her all the time, but she's always excited to declare her expertise and trip over the body. Her "assistant," who she calls "Rinrin," is actually just a classmate (not an assistant or even a friend), who happens to be a lot better at figuring out murder mysteries. Their first murder of the series happens on a school excursion, when a maid finds a man stabbed to death in his hotel room!

From Leaping into Puddles:

Clumsily, he panicked and hid the flower bouquet behind his back...

This is what happens one day when ordinary girl Kogure Nao is summoned by the scary-looking Onigase-kun. However, she is shocked when he says to her: "Please date me before you marry me!" Nao is too shocked and terrified to say no. What will come of their relationship?

Momoko is not your average high-school girl. In order to support her family (her younger brother and her hospitalized mother), she works as a popular author! But she doesn't write just any books, she pens erotic novels! It's quite an exciting job, but for Momoko, it is one of high stress because, you see... she is a virgin! Fortunately she has a great imagination, and does very well for herself and her family. However, because of the nature of her work she must keep it a secret.

Momoko's troubles begin when Inui Ranmaru, a popular super model and new transfer student at her school discovers her secret! In order to keep him from telling, Momoko becomes his slave?!

From: Easy Going Scans

They walk like ordinary people, they talk like ordinary people but in fact there is nothing ordinary about them since they can materialize an image they have on their mind... They call themselves Chachaoong which also means Shaman and they do not know how or when they came to this world. It is now a time for their current king to choose the future one and so he did by choosing Yu Jin an ordinary human...? Many of the Chachaoong can not tolerate a human ruling them and now the poor Yu Jin not knowing what suddenly hit him, is trying to avoid the Chachaoongs who are trying to kill him!

"Handsome Prodigy" Nanao's heart thumping royal love story starts! I didn't think that I would want to tame something unmanageable...

That Konoka has been given the task to tame the young prodigy, Kairi. The secret that they share...

Collection of short stories:

1. Kemono Renairon

2. Karakuchi Kakumei
Natsui has always liked the chairman of the student council, Kazuki Oda. But ever since a long time ago, she's been bad at dealing with people. She easily gets nervous, and, to hide her embarrassment, always puts on a hard face. So how will she be able to make her feelings reach her admired Oda-kun?!

3. Sore wa, Nigai, Chocolate.
Yuri hates to be alone, so she'll spend time with any guy who comes along. Chiyo Kyosuke, a teacher at her school, finds this behavior repulsive, but Yuri seems to have fallen in love with him all the same.

4. Eien no "Suki" ga Hajimaru Hi

A new official spin-off of the popular weekly series Haikyuu!! In which our protagonists are the members of the rival schools. A comedy series about their ridiculous antics that you can't read in the original story!

Igarashi is now in college. The bittersweet memories that he left behind in childhood are now beginning to awaken when he meets his childhood friend Chiyo-chan again after 10 years.

A girl looks for her missing pet dog.

Ayano-san is a beautiful housewife with a son, Yuusei, who doesn't seem to approve of her carefree ways. Always smiling and well-meaning, Ayano-san still finds a way to make herself an object of curiosity and appreciation by passing people.

Okano Hajime is an ordinary - or maybe below ordinary - girl who was forced to take care everything in the family since she was young, because her family was very poor. Hajime had five younger brothers, who were quintuplets, and they were scouted by a music company. Thus, the realistic yet dreamy older sister had to try harder to watch over her restless brothers and to pursue her own idol, who was in the very same company.

A guy finds himself transported into the world of a classic horror movie. And what's more, as the 'slutty character' who dies first!?

Once upon a time in the small town of Hiraya, Nagano Prefecture, lived a normal high schooler named Seta Rinichirou.

One stormy night, he found a Princess named Polilyfa and the Female Knight (Valkyrie) who served her, Krauzera, collapsed in the middle of paddy field. Both of them had escaped from their country who fell to Orc army attack using Gate magic. And now they established a government in exile at Rinichirou house.

Between jealous stalker childhood friend, Princess Pau and Krauzera fascination at Japanese modern technology and culture, and superdense Rinichirounium, a slapstick comedy choked with otaku culture reference in a rural Nagano countryside will begin!
Also, the people from this world and from that world began to visit one after another.

Every day, Yamada Ichirou takes a path to school that crosses with the girl he likes, Fujisaki Shiori. Every day, he thinks that maybe it will be the day he'll have the courage to speak to her. However, hundreds of days have passed and he still hasn't even managed to say one word.
One day, the overly developed 11-year-old Sakura Moe and her mother move in next door to Yamada. While her mother's away, Moe runs over to Yamada's house in a bath towel, demanding that he "rescue" her. Unluckily, that day also happens to be the first day ever that Shiori comes over to Yamada's house on an errand about schoolwork. Now she not only thinks he's a stalker, but also a pedophile! Will Yamada be able to convince her it was all a big misunderstanding or has he lost the girl of his dreams before he even got the courage to say "Hello"?

The adventures of a wandering penis. Yes, you read that right.

Himi is an office worker who has a habit of saying "I want to die" whenever he feels stressed. One fateful moment his wish was granted and now finds himself in an arena along with a group of people. They were summoned by the Death God Mei to play the Death Game. Only the last one standing can go back.

Bell Cranel is just trying to find his way in the world. Of course, in his case, the “world” is an enormous dungeon filled with monsters below a city run by gods and goddesses with way too much time on their hands. He’s got big dreams but not much more when a roll on the random encounter die brings him face-to-face with the girl of his dreams—but what’s an amateur adventurer got to offer a brilliant swordswoman? And what if the lonely goddess who sponsors his solo adventuring gets jealous?

Kamiyama village is considered a "ghost town", with an ever declining population. However, the mythical creatures known as "genjuu" who live there aren't counted towards the population total. The human girl Akane gets forced into the role of the Kamiyama village Public Outreach Committee president. Along with the help of a minotaur, a cyclops, a phoenix, and more, she's tasked with revitalizing the village. Follow the struggles of the beautiful genjuu girls straight from the mind of the up-and-coming mangaka, Koto!

In Ome, a city in northern Tokyo, the adventures of four different characters of different mentality and cultural background will take place. The only common interest they share is their love for sports and parkour. The heroes are four children that destiny brought together to enable them not only to help each other but also to achieve their personal goals. Tension, competiveness, humour, friendship, intrigues and lots of parkour are the main elements of the world of R.u.N. Are you ready to Remember ur Nature?

From Tokyopop:

Brilliant and overachieving, Misaki Ayuzawa is the President of the Student Council at Seika High School, formerly a boys' school. Unfortunately, most of the students are still male and stuck in their slovenly habits, so man-hating Misaki really socks it to 'em in an attempt to make the school presentable to attract more female students. But what will she do when the sexiest boy in school finds out that after school, Misaki works in a maid cafe.

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Also included in this manga is a short story called Toumei na Sekai in volume one.