A manga adaptation of the anime.

Sakazaki Riko, age 31 and also known as Magic Girl Collie, is lonely. Ever since she was a child, she used her magical powers of being able to turn into an adult to help people and solve cases. It has been decades since she started and Riko is now 31 years old and single. The one magic power she had is now useless as she's already a grown up. Find out what happens to a witch after her prime who goes off to search for someone special.

Nomura Chizuko - a witch - is bored with her everyday life in the magic world. "That's it! I'll go to the human world and get some new motivation!" With that in mind, she heads off happily to her new life in the human world. With her childhood friend, Oosawa Nobuko, sticking close by her everyday to watch out for Yurine, a human who dreams of becoming a magician that befriended Chizuko after she arrived and is now doing as she pleases with Chizuko.

From DMP:
Kojima seeks to befriend the class outcast, and soon learns of Nakahara's troubled family life - of his uncaring, abusive father and mentally unstable mother. As Kojima yearns to somehow comfort Nakahara, he gradually becomes aware that his feelings for the other boy arise from more than mere sympathy. When Nakahara declares his own romantic feelings for Kojima, their relationship becomes one of sexual exploration as they face their first steps into adulthood together.

Two manga artists are trying their best to have their work accepted by someone who appears to be their superior. However, their latest work has been denied!
Their superior requests that they write a manga about a drama where a man protects the peace of the world. The two get together and begin to write a manga about a boy who promises a girl protection!

The leads in this story are the duo mangaka mentioned in the 20th Century Boys manga, who together go by the name of Ujiko Ujio, a pun on the duo who went by Fujiko Fujio (FUJIKO Fujio (A) and FUJIKO F. Fujio), the creators of Doraemon.

Taken from DramaQueen:

1) Mandayuu and Me
Kyohei is a serious, responsible office worker while his friend, Mandayuu, is anything but... a talented, high-strung, and perpetually horny hentai artist, Mandayuu is always getting Kyohei mixed up in his hare-brained exploits. Whether it's posing for Mandayuu's comics or getting trampled by rabid fans at an anime convention, life with Mandayuu around is many things, but it's certainly never boring!

2) Mandayuu and Me - The Comic Bastard

3-5) Take That! My Love - Kyouhei's Love Trance

6) Mandayuu and Me - New Year's Eve

7) Tell Me the Price of Love (Kissa Kisara e Youkoso)

By day, Takeo is the president of an up-and-coming IT company. But by night, he's a total otaku. The problem is, for the past 17 years, he's been desperately in love with someone - the self-centered Fumi, a man who happens to hate otakus. No matter how many times Fumi rejects Takeo, the he refuses to give up! But now all of a sudden Fumi is accepting a date with him...?!

English publication via Renta!

From: Alice Dreams
This is a collection of five shoujo oneshots by Shirasawa Marimo.

A collection of stories:

1-3. The Heart of Miscalculation
"Why don't you date me?" And that's how Miki started going out with Udou, from next door's classroom, who was fighting with his ex-girlfriend. It was because of a whim, just a "game". But being with Udou, he started getting comfortable? During the sex, Udou took control of him with tricks, making him tremble in pleasure. Tender caresses, sweet passion? What happened to my body? Damn, I'm not like this. A traditional boyfriend, and a boy who likes to flirt. A story of pure and immoral love between high school students.

4. Last Summer Blues
A bittersweet story about two boys who love baseball.

5. A Vulnerable Afternoon
What happend if Oomura breaks his glasses? Maybe finally he will be able to see good side of Tamachi, his workmate?

extra The World Revolves Around You
- bonus - related to: Sekai wa Kimi de Mawatteru

From Ochibichan:

Perky Yaaya is a first year student at Koushinmaru High School and a new member of the school newspaper staff. In order to become a full member of the staff she must uncover the identities of the Sannin Kichisa, a mysterious trio of masked avengers haunting the school!

The year is 2035 and schools have been suffering from a lack of child birth which has caused many of them to close. An energetic girl named Manami Amamiya transfers to a new school where she quickly becomes the student council president and starts to bring back some vigor in the students’ lives.

The story is about a boy named, Shichiri Tasuke, a junior high school student who lives alone. His parents are constantly traveling the world. One day his father, Tarousuke, sends Tasuke a strange ring he found in China. Legend has it that if someone of pure heart should peer into the ring then a guardian from heaven would appear to protect him or her. When Tasuke inspects this object, a goddess appears from within the ring. Her name is Shugogetten Shaorin, commonly called Shao, and her destiny is to protect the person who releases her from the ring...

"I want to join the basketball team, but Jump already has Slam Dunk, and I don’t want to join the sexy commando team." With this reason, Tetsujin Shiota and Shigeo Nara have no choice but to join South Makuhari High School's baseball team. The unmotivated and ill-natured manager Miho Sakurai, as well as the gullible Koji Kanoya who was added on just to fill up a slot, make up the rest of the team in this coming-of-age story about a baseball team that doesn't play baseball at all.

The manga is a parody and critique of editors, comedians, and other works within Weekly Shonen Jump. Examples include Sakigake!! Otokojuku, Midori no Makibaō, Rurouni Kenshin, Slam Dunk, Dragon Ball, and JoJo's Bizarre Adventure.

Source: JoJo's Bizarre Encyclopedia

Series of oneshots:

3) Let's Embrace the Moon and Walk

4) My Master is a Love Maniac

5) You're My Treasure

Atsushi, an ex-chef, Torajirou, a high school baseball player, and Nakagawa, a famous ex-composer (all 3 losers in life) started up a Convenience Agency. Then, as if fate had a hand in it, Nakagawa once again crosses path with Takahashi, an incredibly talented young composer, when a job that needs Takahashi's expertise arises, rocking the three's otherwise quiet life towards a whole new direction. From making you laugh to moving you to tears, this is a story of love and peace, and the world as seen by losers.

Sorata is an everyday boy, who loves a girl called Futatsugi. When he was in elementary school he saw a girl in his dream, and on the very next day Futatsugi, who looked just like that girl, transfered to his school. Sorata holds on to that memory, but after he finds out about Futatsugi and what power she holds, can he still say that he's in love!? [From Owls Scans]

Features the same characters and locations as Mahou Sensei Negima!, however, this series has a different story than the original. The new storyline explains the addition of punctuation to the title.

Mazinger Angels Z is a sequel manga to Mazinger Angels. The series takes place a few years after the defeat of Dr. Hell, with Maria attending high school at Paradise Academy and an undercover Sayaka is the nurse of the same school. A new main character is introduced, Kikunosuke Abashiri. Also introduced are the Vegan Empire with the manga using a plot similar to Grendizer.

1-3. Harapeko Usagi to Koisuru Ookami
Shirou wants nothing more than to pet a fluffy rabbit, but his cold and stern expression betrays him and he's never had the chance. So when he finally gets his chance to hold one such fluffy rabbit, you think he'd finally be content, though now it seems his attention has been caught by the young struggling uni-student Kou. He's cute just like a rabbit, but he's not a rabbit, so then what is this feeling?

4-5. Neko Kaburi to Kenage na Chuuken
An undesirable, inseparable relationship with a black-hearted prince is a sweet but dangerous trap of love.

6. Bangai Hen - Jitsu wa Daitan na Couple Hen