From Viz: What happens when an all-girls' high school reigning tomboy finds out her school is about to be filled with boys!? Hanabi Oozora is a rambunctious sixteen-year-old tomboy who comes to the rescue of her less assertive friends--sometimes in exchange for food. So what does she do when, all of a sudden, her all-girls' school is about to be integrated with an all-boys' school?! She meets and falls in love--naturally--with one of the three most popular and handsome boys in the Student Council, Yasuaki Garaku! Unfortunately, Yasuaki doesn't care for girls... and when the girls' Student Council clashes head-on with the boys' Student Council, Hanabi steps in to become a member - hoping she'll change Yasuaki's mind!

From ShoujoMagic:

As the substitute for a teacher on temporary absence, Shibata Seiko is now the teacher of an all-boys' school. As she just made up her mind to be a fantastic teacher, a man has come into her life and took her as his 'sex toy'?! And the man is actually a teacher from Seiko's school!?

‘Habataki ~Ein Marchen~’ is an adaptation of popular novelist, Hori Tatsuo, (famed for his modernism and proletarian literature during the Showa period) novella of the same name. This is one of his early fantasy pieces published in 1931 and collected in ‘Hori Tatsuo Early Fantasy Masterpieces’.

From Dan of Population GO:

"Mutants have popped up in Tokyo. These mutants are the relatives of gods and upon consuming human blood they transform into their awakened state which resembles the god that they are related to. Hachi has a nose as good as any dog's. After his best friend is attacked by a mutant he drinks her blood in order to save her."

From K.I.S.S.:
Shinichirou would rather spend his life playing games on the internet, but sadly he's a heir to a company. His grandfather deems his current life-style unfit for a heir, so he throws him into a house with eight young and beautiful girls. What's more, within one year he'll have to choose one of them as his bride. What will happen to him now?

"This impure feeling should just disappear..."
Hachi and Ritsu grew up hanging out together in the countryside despite their stark differences. Ritsu thought their relationship would never change, but Hachi suddenly moved to Tokyo after junior high school graduation without saying anything to Ritsu. Ritsu can't believe he was being neglected, so three years later he decided to go after Hachi in Tokyo... This time he will not let Hachi escapes, even though that means he must prepare for another heartbreak.

In order to eat me, my enigmatic stalker is protecting me from other strange women―

A high school boy, Sakurai, has a secret he cannot tell anyone: he has been plagued by stalkers since he was a child.
One day, his classmate, Ueda, suddenly transforms into a monster, revealed to be one of his stalkers.
Miyako, who has always been closely following him, appears and saves him.
She tells Sakurai that the monsters, commonly known as urban legends in Japan, are after him because they love him.
What will be the fate of Sakurai who is loved by countless creatures disguised as beautiful girls?

Links:
Author's Pixiv: https://www.pixiv.net/en/users/25451722
Author's Twitter: https://twitter.com/tadaresan

A strange reunion with his first love.
Stowed away deep in his heart
The continuation of that summer break ――
Set in Tanegashima
Where the past and present will intertwine
A brilliantly heart-wrenching adolescent love story.

From Chibi Manga:

I don't have family, friends or a lover. But there's someone I love. We have that strange relationship: childhood friend.

Alternative Description:
Koharu and Nacchan are childhood friends which many of their friends thought they are a dating couple. Soon, after getting into senior high school, Koharu feels something different with Nacchan. While Koharu tries to figure out her feelings, Nacchan's already falling in love with someone else, the beautiful Saionji, but his love doesn't stop him from caring for Koharu. Does what Nacchan feel towards Saionji really be love? Why can't he let Koharu go on a blind date? "Love is a word that describe so many kind of feelings"

From Attractive Fascinante:

A forbidden relationship between a sensei and a student connected by chocolates and jazz, a couple who has yet to see the importance of each other's existence as a blessing, a May-December relationship connected by Millefeuille and strawberries, one who struggled to accept his own sexual preference, another who's trying to find peace with himself while carrying the burden of work, love and family and one who finally decided to go for what he wanted. 6 beautiful stories to bring you through the ups and downs of life and love, complete with humor and sweetness.

From Aerandria Scans:

The time is set during the Industrialization Age in Meiji. The main character Chitose works as a maid in Kuze, one of the most prestigious households of the time. One day, Lan, a nephew of the master came back from England to be his stepson. Eventually Lan and Chitose’s feelings begin to develop. What will happen with the secret affair between the honey-haired Lan and the maid Chitose?

Note: Hachimitsu no Hana is on hiatus. The last release was in June 2009. The mangaka has been concentrating on her other series, Kaizoku to Ningyo.

This is my duty as a butler...

Son of the marquis, Nicholas has strawberry-red hair, honey-yellow eyes, and syrupy smooth skin. At his side at all times is Eim, his butler. Though Nicholas has already grown up, Eim still loyally bathes his master. One night, Eim walks in on Nicholas fantasizing about his butler’s true feelings...

Includes the love story of an idling instructor and a young knight-in-training!

Luna is seventeen years old, doesn't have a boyfriend, and is getting crazy about it. When an old friend, two years younger than her, comes back into her life, everything will change.

From Viz:
Takemoto lives in a run-down student apartment, where his greatest worry is when he'll next be able to afford to eat meat and whether he'll get to class on time. Although he's away from home and living on his own, Takemoto is far from finished growing up. Along with his crazy cast of friends, Morita, Mayama, Yamada, and Hagumi, Takemoto sets out to discover life and his true self.


Note: Was adapted into a live action film in 2006 and a live action tv series.
Won the the 27th Kodansha Manga Award for shōjo in 2003 (shared with Kimi wa Pet).

Ichinomiya Shingo, a young 25 years old, single, company worker, while thinking of tomorrow’s busy working day goes to sleep. However the moment he woke up, it was a room unknown to him.

He then learned that he was inside a 6 years-old boy and had taken over his mind.

Furthermore he learned a lot from the memories of said boy: he was born as the youngest child (8th son and 10th child) of a poor noble family living in the back country. Having no administrative skill, he couldn’t do anything to manage the vast land his family has.

Fortunately, he was blessed with a very rare talent, talent of magic. Unfortunately, while his talent could bring prosperity to his family, in his situation it only brought disaster.

Yes, this is the story of the boy, Wendelin von Benno Baumeister, opening his own path in a harsh world.

From Attractive Fascinante: Kijimuna, an Okinawan fairy who lives in a banyan tree. About the same height as a young kid, with reddish skin and hair. They will come down from the tree and do naughty things to humans at night. You’ll get happiness if you nurture it and the fairy will never betray you. Tomohisa bought a potted plant that comes with such a resident, Kite. When feelings gradually develop between them, Tomohisa’s senpai and ex-lover, Kazunori, wants to reconcile with Tomohisa. Will Kite try to stop it from happening or will he let Tomohisa choose his own happiness?

Class representative Marui, an ordinary high school boy, finds Hachiyo face-down by a river bed. Even though Hachiyo was regarded as the school’s strongest delinquent, Marui secretly has a crush on her. However, when Hachiyo wakes up, she suddenly can’t remember anything about herself?

Rui Hanaka is a herpetologist who loves reptiles, and is always studying them. But one day, when his beloved leopard gecko Nancy shed her skin, she became super cute...?!

After Kusakabe Honoka is diagnosed with an untreatable disease, her father puts her in cold sleep in hopes for the future. When she wakes up, it seems all of civilization has been destroyed. All she has to help her in this future world is Haco, a dog-like robot that was created to protect her. What happened to the world while she was asleep!?