Life of an Onigiri Cat

School girl is trained by a secret branch of the police to detect and to kill demons disguising themselves as humans.

An cute autobiography based off Ninomiya Tomoko's family life, with her husband and son.

The Onigoroki is a festival of demons that happens every 300 years. But on this special occasion things go differently as one demon decides to protect humans.

When she was five, a girl's father was murdered by an ogre. She spends her life trying to find the ogre, so that she can get her revenge.

Weak, bullied, and pessimistic about life, that's Setsuna Kashiwagi. On the verge of jumping off a bridge, a mysterious man appears behind him and offers the contract "10 million yen in exchange for your life in a year." Skeptical at first, he accepts. Waking up the next morning, thinking it was just a dream, he notices 2 beautiful women sitting beside him. They are Kanna and Rena, Oni princesses here to claim his heart in a year.

Haruki's younger brother Natsuki dresses like a girl and always clings to him. This is starting to cause problems after Haruki gets into high school, so he tries to think of a way to work things out with Natsuki.

Self Published WebManga Presented by Grinp-Circle

A TS Slice of Life Comedy about a brother who was transformed into a girl by his little sister strange drugs.

A story about triplets who love their older brother 12 years apart, since age doesn't matter to them.

Hirose Goushi has a huge sister complex. So huge, he moves from his home town to Tokyo to attend Myouzen University in order to escape it!
Three years later, Goushi's little sister Noa shows up and informs him that she's taking the Myouzen University entrance exam and that she will be moving in if she passed. Little does Goushi know, she has a similarly large (if not larger) brother complex.

From Angry Fox Scans:

The story is about the Himenokouji twins named Akito and Akiko who got separated due to certain circumstances and after years of living apart they suddenly began to live under the same roof once again. Things were fine at first until Akiko began expressing her love for her older brother. Now Akiko must fight to defend her extraordinary love for her Onii-chan as she battles against all odds and three other girls who are after her beloved Onii-chan.

Ikezawa Sumire's three elder brothers, Asagi, Ai, Kon are so beautiful even friends get jealous! Sumire too loves Asagi and Ai, but for some reason she just can't like Kon. That reason is...!?

Adoptive siblings love.

Saya is an average school girl in every way but one: she's got a HUGE crush on her older brother! She's never been able to raise any flags with him (mostly due to her habit of beating him to a pulp whenever she sees him), but one day, she wakes up in the body of a cat that he brought home! Could this be her chance to make her beloved older brother fall for her?

Junior High student Nao's brother complex is so strong, it's almost at the point of incest. She's determined to make her brother, High School student Shuusuke, see her as a woman. So determined, that she goes as far as going into his room to throw away all his non-incest related porn. But as she's looking for his porno stash, she finds a photo album... and she's not in any of his childhood pictures. What is going on? Reading direction: Right to left

From Esthétique:

Sakura had lived with her grandma ever since her parents died in a car accident when she was three. When she turned fourteen, her grandma also passed away, leaving her alone. Just when she was about to give up hope having a family, out of nowhere, four guys claim to be her older half-brothers.

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- Himitsu no Tobira no Kugurikata (Vol. 4)
Terasima Tika has always wished to meet her prince charming. When she accidentally enters the 'Spirit Door' and is placed in the body of her brother, she is forced to be him for the day and go to an all boy's school where she hopes to finally meet her prince.

A classic manga about girls at a private all-girls school. The storyline centers around the experiences of Nanako, a "normal" girl who is invited to join the prestigious school organization, the Sorority, and is resented by all the other students because she doesn't appear to be qualified. Other key characters are Nanako's two friends: Tomoko, her friend since childhood who is alienated by Nanako's decision to try to join the Sorority, and Mariko, a strange, obsessive girl who is invited to join the Sorority along with Nanako; her "older brother," Henmi, who she corresponds with by mail; and the "Three Magnificent Ones," all of whom are admired and quasi-worshipped by the rest of the student body: the head of the Sorority, Miya-sama, the haunted, pill-popping rebel, Saint Juste, and the star athlete with a mysterious disease who doesn't like the Sorority, Kaoru-no-kimi.

Contains an unscanlated oneshot in volume 3: Early Spring Trembling.

From Chibi Manga:

The eldest son, Yukiya is a man who wears glasses and has gentle manners, but is a SM fiction writer. The second son, Kousuke, is a handsome youth with a childlike face, but he is the number 1 host. The third son, Masaki is an extremely popular idol, but he is ill mannered and like to tease everyone…and these three older brothers dote the youngest child, Miyuki with excessive care. Trying to escape from their constant interference she creates a plan but…!?

Story 2:
Strong way romantica
about a priest sensei and a 2nd year student responsible for school regulation reinforcement.

Story 3:
Please teach me, School President!

Takaho was pleasantly surprised when it was announced that her older cousin, Fujistsugu, would be moving in with them. He was her first crush and she was hoping to deepen her bond with him as a little sister. Little did she know that her seemingly handsome and perfect cousin was actually—