From Easy Going Scans:

Chang An in the Tang Dynasty of China (618-907): The demon star is passing through the sky, calamity is about to befall the Tang Dynasty - because of a woman.
Skilled in martial arts and war tactics, Princess Li Chang Ge sets out to avenge her family and take back the throne.

From Tokyopop:

Kantarou, a folklore scholar living in the Taisho period, has various and sundry adventures. But Kantarou moonlights as an exorcist solving the problems of ghosts and demons, all with the help of Haruka, the legendary demon-eating tengu!

Note: The serialization was in a shoujo magazine: Comic Blade Avarus.

Koiko has lived her life under an overly-attached mother and a distant, neglectful sister. While she dislikes the idea of drowning in it, Koiko still wants to be in love, so she settles for being an average high schooler with an average boyfriend and an average relationship. One day, the most popular boy in school, Tsurugi, sends her a message: "Your boyfriend is cheating on you." This is where our story begins!

From Transcendence:

Ardour is the hottest pop boy band out there. All members, Sheng Ye, A Yao, and Wei, have the looks, skills, and talents that any fans would want. Lian You Yi is a normal 15 years old girl, who does not know about Ardour, even though her father is the manager of Ardour! Due to her father's inability to take care of the band, You Yi is offered to be Ardour’s new manager. You Yi accepts the offer because if she didn't, then her father would be fired! However, what she does not know about are Ardour memeber’s cocky attitudes! How will You Yi manage this band? What will You Yi do in order to keep her father’s job?!?! And will one of the boys show kindness to her, and will romance spark?

In December of 1970 Takemiya published a short story, "In the Sunroom" (in Bessatsu Shojo Komikku) which is possibly the first shonen-ai manga published and contains the earliest known male-male kiss in shōjo manga.

The manga volume consists of five shorter stories:

- Sunroom Nite (In the Sunroom, 1970)
- Hohoemu Shounen (The Laughing Boy, 1972)
- 20 no Hiru to Yoru (20 Days and Nights, 1973)
- Star! (1974)
- Mister no Kotori (The Mr.'s Baby Bird, 1975)

“I hate men!”

Mao was harshly dumped by her boyfriend. She fell asleep while feeling totally dejected... and turned into a man the next day! Not knowing how to turn back, it was decided that Mao has to live in a dorm as a guy. However, her roommate, Ryuusei, is extremely curt and annoying.

How will her life turn out?!

“I’m not interested in revenge!” Rosemary was branded as a villainess and hung for a crime she didn’t commit. She reincarnates as the commoner, “Marie,” while still retaining the memories of her previous life and hopes to live peacefully this time. However, contrary to Marie’s wishes, she ends up returning to the royal palace.

“Sister, how do you want to punish the people who killed you?” Her brother, whom she doted on in her previous life, had changed completely and intended to take revenge on behalf of his sister. “Master, please tell me your desire.” The knight who swore allegiance in the previous life swears his allegiance this time as well.

I’m not thinking of taking revenge on the person who killed me. However, the people around me will not allow that…

When the Duke's Daughter Alice was five years old, she realized that her world is exactly like that of a particular otome game. As far as she's concerned, this world where magic and magical beasts are commonplace is paradise?! With good-looking boys and fluffy beasts all around, not to mention her cute school friends and dangerous rivals... what more of a dramatic isekai school life could Alice ask for?

I ended up possessing the body of a stepmother in a fairytale, who was so jealous of her stepdaughter that she poisoned her and was executed by her husband. As I was getting along and showering my cute and lovely stepdaughter, Blanche, with love…
“That’s strange. Since when did your wife treat your daughter so preciously?”
…my idiotic husband kept getting in my way!
“I am also Blanche’s parent. You need to apologize for being suspicious of me.”
“And if I don’t?”
“Then I shall come find you in your bedroom, Your Grace.”
“…..”
“I’ve also prepared an especially sexy lingerie as well.”
And that’s how I dealt a fatal blow with a smirk on my face.

Afflicted by a "mysterious illness," high school first year Kuroe has spent her entire life avoiding socializing with others. However, after coming into contact with Minami Arata, the most popular boy in school, something changes--and Kuroe's true powers are unleashed...

Straight A student Yuka is a little too honest for her own good and has no friends but unexpectedly begins dating Haruomi after he helps her out of a difficult situation. The only problem is, Haruomi has a strict policy of dating someone new every Monday…

With 99 nations conquered and the cup of the ruler in her hands… you'd think she was off to a heroic conquest, but the great queen's Cecia's real concern was her uncomfortable corset?

The queen of Valencia suffered from complicated laces and heavy corsets, and thus ordered her trusted brother, Duke Ennon Lionheart to bring her a comfortable clothes.

Meanwhile, Yuri, a clothing designer was killed in an accident after suffering from a small minimum wage at a medium-sized clothing company in Korea. She was reborn in a medieval country ruled by Cecia.

Yuri vowed to revolutionize the outdated clothing dilemma, so she dressed up as a man and worked as a designer at the top of the continent's highest court to do easy business.

But… what happens when Ennon discover's Yuri's true identity…?

Mizuha is in a one-sided love with a college student named Ren. Mizuha's whole world revolves around him until she meets, Chiaki, a guy sitting next to her who is a pudding-loving weirdo, who freaks out whenever someone insults pudding. Ever since Mizuha refused Chiaki's pudding, he has been trying to give her some each time he sees her.

An accidental encounter during his childhood made the newly coronated emperor unable to forget the sorcerer he met, A'Luo. When they meet again, can the youthful emperor capture A'Luo's heart? A beautiful fantasy romance is unrolling.

Due to a false charge, Felicia Suwarose got her engagement with His Highness annulled and was expelled from school. There’s nothing but misunderstandings all around her, but the person herself only wants a rose-coloured commoner’s life. It’s a story about characters from “Nation’s Saviour Lady Rose”, an otome game from her previous life.

“Dirty wench! You stole my necklace!” “Unless I knew where your necklace was, I wouldn’t have been able to take it.” As an illegitimate child, Laritte’s biggest sin was being born. In the year she became an adult, she was sent to marry the ghost duke who was rumored to be dead. Her miserable life seemed to get worse and worse, however… Her life changed when the duke came back alive. “Madam, how do you like it?” Kind servants, “You have enough luxury to buy some residences in the capital.” “…no one will be able to look down on you anymore.” And the empire’s devoted and murderous duke. It was already too late for those who tormented Laritte to regret it. [Taken from NovelUpdates]

From Chibi Manga:
Koharu is a first year Performing Arts student at Funakoshi High school. Her class is full of famous popular people making the anonymous Koharu feel slightly awkward. However, "I want to try a task that only I can do it!", and it's with that resolve that her exciting school life starts. She will star in a mini play to welcome new students, believed to make the leading actors become popular in the future, alongside the mysterious Serizawa Ren...?!

Young Alice Estevan has a secret. She was actually reborn in "The Tyrant's Silver Flower", a hardcore, tragic BL where she'll be killed for abusing the male leads! Luckily, she still has time to avoid that fate by liberating Edwin, one of the male leads, from the tower he's trapped in. And though she succeeds in getting the key to free the boy, there's just one problem: he hates her guts! With the threat of death looming ever so closer, will Alice win Edwin over and earn her happy ending?

Sana, the daughter of an item shop in a corner of the castle town, went out to the forest to pick medicinal herbs as usual in order to make recovery potions for the store's products. There, Sana picks up her mysterious book.
Because she read the strategy book, the daughter of the item shop, who shouldn't have anything to do with the story, is greatly involved in the story of the game!
Another world romantic comedy adventure fantasy!

Alois, a man who works as an imperial guard despite being a descendant of the royal family. Elina, a duke's daughter who used to be the fiancée of the crown prince, Gerard. Their destinies completely changed because of the crown prince one-sidedly breaking off his engagement with Elina. However, due to the emperor's intervention, Alois is to return as a member of the royal family and wed Elina?! This is the story of two people who, because of their sympathetic natures, are toyed by their circumstances, but soon come to learn about love and how to nurture their feelings.