Reid, a hero who lost his life during in a fight with a devil, was reincarnated as a daughter of a married couple who were his fellow comrades!? Although he was reborn as a baby again, with “as expected, I couldn’t breast accept milk from my former fellow comrade” in her mind, she refused to receive the breast milk from her new mother who was her former fellow comrade. As the result, she grew into a weak beautiful little girl. however, Reid realized that the daughter of the hero and the saint could become stronger than anyone. with the experience of her previous life and the talent from her new parents, she had a dream to become a magical swordsman, and also aimed to become a hero again.

The day before 35-year old otaku lady Ryouko Hayakawa's birthday, she met her end by way of a traffic accident――――or at least, she was supposed to. But when she opened her eyes, she found herself in a fantasy world.

What's more, she had reincarnated as the blond-haired, blue-eyed seventh prince, Herscherik! Fully enjoying a leisurely prince life free from worldly cares as a prince, Herscherik finds the king of this great country despised by retainers and officials alike, with corruption running rampant; quite the unpleasant state of affairs. Realizing this at a mere 3-years of age, in order to save the country Herscherik will have to rely on the "office worker" skills and "conman ability" from their previous life and take action!

Aliens? Magicians? What does this mean for a world where espers are fundamental to the pillars of society?

High school student Tetsu Iwaoka notices that his classmate Mogumu is always alone at school. Wanting to give Mogumo a chance to make some friends, Tetsu invites Mogumu to work at his family’s maid cafe. Although Mogumo is initially enthusiastic, there is just one problem: this is a girlyboy cafe, but Mogumo is adamant about being neither a boy nor a girl.

Simo Häyhä's adventures continue after the Winter War.

In June 1941 Finland launches an attack to reclaim the territories lost to the Soviet Union in what ended up being called the Continuation War.

A heroic sturdy male general, woke up to become a weak woman. The emperor however wanted this to happen, but also he wanted her to be on the battlefield, defending the homeland. However, she is no longer strong, how can she be able to fight?

This series follows the adventures of two main characters as one of the characters goes through a series of episodes in discovering his female identity as a trap. This is a series in which each adventure is a self encapsulated oneshot not dependent on previous oneshots for a coherent understanding of a story to occur.

Xiao Man, the beloved heir to the north area's martial arts club, suddenly decides to transfer to a south area high school to pursue "him". However, on her first day as a transfer student, everyone –including the teachers– mistakes her for a male delinquent. How will she get the boy she likes to see her as a love interest instead of a "buddy"? Adventure into the life of Xiao Man!

A collection of one-shots... 1) A long time ago there was a princess who was not afraid of the silver demon. Now after several years she has been reincarnated...

Our unnamed protagonist is an ordinary high school boy who loves Magic Walker - a super-popular card game. In particular, he loves the Elf Deck: a selection of cards that, while seemingly weak, can be incredibly powerful when played right.

One day, while on his way to get a new elf card, he gets bullied by his peers. One thing leads to another, and soon he wakes up in another world... in the body of the elf character he was hoping to get his hands on. And wouldn’t you know it, he can summon elf cards from his old world too.

From the duo who created Mazumeshi Elf to Yuboku gurashi: https://mangadex.org/title/33529, and the author of Dungeon Nursery.

From Friendship Scans:

Princess Rosely’s fate was sealed when she first picked up a sword to try to kill an evil wizard. Little did she know the legendary Lucilys, Sword of Light, had chosen her to be its heiress, bringing her peaceful life in the castle of Altodias to ruin.

Soon, the young princess encounters the pain of losing all the people that she loved, and being separated from her twin brother Rolant, the heir of Silvan, the Sword of the Moon. Rosely would have been even dead floating in a cold river if she had not been saved by a handsome green-eyed king of the Alf.

Growing up as the king's foster daughter in Alfheim, Rosely learns magic and martial arts from the Alf, only waiting for the day she can avenge for her lost country. Will she be able to fulfill her will? What does the fatal sword Lucilys have in store for her? Will resentment drive her into insanity? Who was the one behind all her misfortunes? And who could have been the chosen owner of Soles—Sword of Sunshine, the third one in three ancient magic swords?

This fantastic tale will make you want to believe in fairies again!

Summary from Comic Walker :
Holy Brave, Toudou Naotsugu was summoned from another world to defeat the Demon Lord. Priest Ares was ordered to provide support for the the hero while hiding his true level, however... This is a story of High Priest Ares guiding the Holy Brave on their path to become a Hero.

My classmate Kashiwagi Otome, is a cute girl, but she dresses as a guy. And so, but why...I hide as a girl. Full of Tsukkomi (straight man character in jokes) everywhere!? An obvious tomboy, with a bit of ecchi school life comedy!

The world shared by humans and ajins (those who are half beast and half human) is not paradise. On the contrary, humans rule over ajins with strictness and contempt, using them at their own convenience: men as soldiers for their special powers and women as prostitutes, downgraded to the lowest rank.
To change that destiny, Kogetsu serves the king under the guise of a man.

Story set in the same magical world of "Reimei no Arcana".

This is a story about a mob ojisan who, one day, suddenly becomes the heroine of an otome game.

TL/N: Mob in this case means NPC instead of gangster

The ancient civilization fell and was sealed away, Humans found a mysterious stone tablet and a man that slept for eternities, through researches, they released the 100% virtual world, the federation governments expand across the globe, millions of people immersed within. while the Main Protagonist was entering the virtual world, his gender changed and became a woman, starting a series of bone-chilling adventures. Reality is entangled within Virtual reality, moving the world towards an unknown direction......

Two childhood friends, a boy and a girl, used to share a secret magic. Now that they're in high school though... A story of secret love from an outstanding writer.

Okushida Haruru finally gathers the courage to confess to her crush, Hakozaki-kun. But, the moment after, she blacks out. She wakes up in a pilot suit in a cockpit inside Hakozaki-kun's head. What will Haruru do now?

A story about a boy turned into a violent magic girl.

From MangaHelpers:
In the near future, aliens from Bluto “invade” the Earth. But what is their objective? To steal all of the timed sale groceries at rush hour and make perverted havoc among the citizens. Not the kind of aliens you would find every day. To counteract this “terrifying” enemy, a special force of heroes, “The First Star Heroes,” has been sent out wearing dynamic colors. But, out of the five heroes, two of them have a secret. Momose Kaname, a 14 year old boy who has idolized these heroes, is transformed into the team’s Pink Hero and now has to hide his identity. And “he” finds out that the Red Hero of the team is actually a girl who has experienced the same gender-bending transformation as Kaname. What will happen to these Heroes, especially Kaname, as they face all kinds of odds during their “heroic” days?