Himeko Kurusugawa and Chikane Himemiya are two high-school girls at the prestigious Ototachibana Academy in the fictional Japanese village of Mahoroba. They are also the reincarnations of the solar and lunar mikos. When their ancient enemy the Orochi (the eight-headed Yamata no Orochi of Japanese folklore) rises once more the girls’ long-sealed personas awaken to defend the world!

'Kannazuki no Miko' Spin-off Manga and 4th alternate reincarnation of Himeko and Chikane.

Kannazuki No Miko - 1st alternate reincarnation
Kyoushiro To Towa No Sora - 2nd alternate reincarnation
Zettai Shoujo Seiiki Amnesian - 3rd alternate reincarnation

After being in a middle school full of Yankees and being humiliated by them all the time, Momose decides to change her appearance when entering high school; however, her clumsiness keeps getting the best of her, so she struggles to fit in. All she wants is to get away from the bad guys and it seems like she finally found a club to belong to, but the only other member of this club is not quite what he seems...

On her 16th birthday, Melissa, apprentice of the royal castle, decided to work outside the castle's limits. After becoming an official priest of the royal castle, she got to work with her beloved dragons, and well as the Dragon Knight captain, Hubbard, and his favored dragons. But all of a sudden, the captain quit!
A popular "ichijinsha bunko iris" work, the fantasy love story of a tough Knight and a dragon lover.

The conflicts and fights over daily trifles have never ceased between this pair of interesting siblings, the cool little sister "Secondra" and her funny elder brother "Minuto", but as long as one of them is in need of help, the other will never stand aside and do nothing. What a weird match! Now let's have a look at their friends. Joy Zhen, the old chum of Minuto, is a handsome boy with simple mind. Grace, the best friend of Secondra, is a warm-hearted girl who mistakenly regards Minuto as a bad boy. So here starts our story...

A girl saves Houjou family's third daughter from drowning herself. The girl takes her place as Houjou Ran who shall become the Tendou family's bride but her deceit is seen through..?

Yuna is serious and reliable, what will happen when she meets the mature yet slightly airheaded Biyori…?

Neo, who is about to make his major debut in the band, gets constantly injured. A traffic accident that happened for three days in a row, a mysterious high fever and him constanly falling down the stairs... The manager ordered me to remove the curse, and the one I was heading towards was a pretty girl- "Yoyo". "I'll help you find the mystery of your destiny", the girl spoke, while stepping into my life----- A bandman with a mysterious attraction, musician x a spirit, who only seeks to find the mystery of fate. The most terrifying mix of love and horror!?? The duo's occultic love has begun!

Chibi-Neko is a young kitten who has been abandoned. She doesn’t know she has been abandoned, and doesn’t know the difference between cats and humans. Indeed, she imagines herself as a human girl and believes she will become human someday. She is found and rescued by a boy named Tokio, who has just graduated from high school. However, he flunked the entrance exams and now is not sure of his future or what he will do. Chibi-Neko soon begins to love Tokio and wants to become a human and marry him someday. But then she sees Tokio with another girl in the park, and sees that he is in love with this girl. She also keeps getting visited by Raphael, a mysterious male cat who tries to tell her that cats cannot become human, they are always cats. What will Chibi-Neko do?

Won the 3rd Kodansha Manga Award for Shoujo in 1979.

Meirin, a junior high schooler, is the real identity of the famous "Dr. Rin" who heads a very popular feng sui website. She is in love with her best friend Asuka, a member of the soccer team. "Dr. Rin"'s advice has granted success for many, yet Meirin's own love life doesn't seem to be going too smoothly?

An earlier work by the mangaka of the popular "Beauty Pop"!

From Chibi Manga:

Four companions are living in the same mansion. They're sharing the same school, their family, their future but also… love stories. But now, their journey to become adults is about to begin…

Despite being the daughter of the Holy Empire’s most revered divine leader, Leticia is rumored to be a ruthless, bloodthirsty tyrant. The thing is… none of the rumors are true! After years of living as her vindictive mother’s scapegoat, Leticia is ultimately cursed to die if she doesn’t kill her beloved husband, King Ditrian, with her own two hands. But when the clock miraculously resets to mere days before their wedding, she gets a second chance to save not only Ditrian, but his entire kingdom. This time, will the world recognize the real Leticia before it’s too late, or is history doomed to repeat itself?

Rishe, the daughter of a duke, is stuck in a time loop that begins at the moment her engagement is annulled and ends with her early demise at the age of 20. She has now begun her seventh loop.

In her past do-overs, Rishe experienced various occupations, including being a merchant, a pharmacist, and a knight. But this time around, she simply wishes to live a long and leisurely life!

That was the plan, only for it to be derailed by an unprecedented marriage proposal from her killer in the previous loop, the neighbouring country's Crown Prince—?!
Original Web Novel: https://ncode.syosetu.com/n1784ga/

With her engagement annulled, Tiararose was supposed to have been exiled from the country.

“This is the otome game I played!” She realized on the day before the story’s ending.

Is waiting for my conviction the only thing I can do? But, I did not do anything too cruel... Thinking so, the ending proceeds.

However, during the judgement, something that was not possible in the game happened. Tiarose was proposed to by the crown prince of the neighboring country.

Because of her appearance and her behavior, Yoi has been continuously treated as a prince, despite being a girl. One day, when she already accepted being put into the role as a prince in high school, she somehow got entangled with one of her senpais at school, someone who's also being called "prince"?

Cayena, the Imperial Princess, was known as the most beautiful woman in the Empire. She was a woman who knew nothing but evil and luxury.
However, she was destined for ruin: she would be used as a chess piece by her younger brother to secure his throne and killed by her crazy husband.

“I’ll make you the Emperor.”
“… Sister, you're going to make me the emperor?”
“In exchange, give me freedom.”

She had to change things before she became that Cayena.

On the second morning after my 20th birthday, a miracle happened. On that day, I found out the truth: my fiance had had a hidden lover, my very own cousin. After that, I decided not to believe in love anymore, and died miserably.

When I woke up, I was in my past. This time, I want to have a relationship with no strings attached, and without any superficial feelings such as love. So I proposed a marriage; a marriage that would be nothing more than to keep up appearances, where there would be no love involved. "Duke Agentine, will you marry me?"

From Summer Rain:

The story unfolds in the Edo era in the Yoshiwara red-light district of Tokyo. Akane, a girl whose family is from Samurai, is sold to a brothel to be orphaned. To be the "little sister" of the "lady" No 1 spot. This will bring a client ask, then she meets a stranger very peculiar man. What will happen after that meeting?

I'm Airi, an office worker who reincarnated as an otome game's villainess, Irene. I was on cloud nine ready to start my second life when I was expelled from the academy. With the help from the townspeople, I opened a quaint café. I was supposed to enjoy my new, peaceful life when suddenly "a fluffy creature" appeared! I tried to feed him my signature sweets, but...?!

From JShoujo Scans:

Saho, in her opinion's, lived a pretty happy life up until now with her mangaka father and a grandmother she lovingly calls "Granny." Sure, they don't have the luxuries of more wealthy families, and she hates how her father has NO care for his fashion sense when he lounges around in sweats all day, but when it comes right down to it, she couldn't love her home more.

However, their peaceful life's disrupted one day when they receive a phone call saying that Saho's mother, who had left her father years ago taking Saho's older brother with her, had passed away. This leads to Mugi, a brother she hadn't seen in ten years, coming to live with them.

She has a hard time adjusting to life with the brother she'd only known from faded family photographs--and his selfish and egocentric nature's not helping matters! Will they ever learn to get along?

-Also includes "P.S. I LOVE HER" which is a sequel to her 5-volume series "I LOVE HER"

From KCG scans:
Hibi Kaho is a first year high school student with a love for the muscular. Spending her days admiring the muscles of club members has become her routine—until she meets the muscular prince, Natsume-senpai of the basketball club. Those biceps! Those abs! Kaho has fallen head over heels again. And when Natsume asks her to be the basketball club manager, her muscular-filled days start!