The protagonist is a guy who is among the stupidest of the stupidest in the school. In this school your grades can, under the supervision of teachers, take a virtual form to do battle! However, if you leave an examination midway, you get zero marks. A bright and cute girl, Mizuki Himeji, had a high fever during her examination. Despite her potential to be the second highest scorer in the level, she obtained zero marks for having left due to her illness and is thus banished to the worst class, Class F.
Grades mean nearly everything. For Class A: They have a smart-looking teacher, a plasma TV as big as the entire wall as their blackboard, personal laptops, personal air-conditioners, refrigerators, adjustable seats and all kinds of different appliances. Within the refrigerator, there are all kinds of drinks and snacks. Their ceiling is made of glass, the wall lets them put up high-class drawings and plants.
As for Class F (the worst class): They have Japanese desks and seat paddings. Their blackboard is dirty and there's even no chalk! Someone complains the legs of his desk are broken, so the teacher asks, "Didn't we distribute some glue to stick wood together? Glue it back yourself later." Another one complains the wind is blowing in from the broken window. The teacher says, "I got it. I'll apply for plastic bags and super-glue to fix it later." There are spider webs everywhere, not a patch of the wall is clean. A unique moldy smell spreads across the entire room; it must be from the old tatamis used to tile the floor. Welcome to Class F.
The protagonist feels displeased at such an arrangement; he seeks help from his friends to try to make a change through invoking war! And they devise all kinds of plans to try to beat the famous Class A, scheming to get Class A's classroom and equipment if they win.

Time reversed, Qiu Yi became a girl, but a male version of himself still exists in this time… 【Am I still myself? Who exactly am I?】 What kind of sparks would ignite when he, who is a girl, meets his male self? Everything is in 《I Am My Wife》.

While cross-dressing, I was hit on by a handsome guy, except she wasn't actually a handsome guy!

From the author of the NTR series "1/10 no Hanayome". Read it with that in mind

Ichabod is a young boy trying to find his biological father. This pursuit isn't made any easier by his tendency to get into trouble with the law. To top things off, his parents are just downright weird: Ichabod was raised by a lesbian couple. Thank god he meets Kirico, who is anything but ordinary.

Although she had been a promising practitioner of kendo in the past, due to an accident she was forced to lead a plain life. After Seo Yuri gets into a car accident during a trip back home, she reincarnates into the novel, "The Song of the Moon," and becomes the elder twin sister of a side character who meets a destructive ending-- Selena. Selena hopes to prevent the destruction of her family, however, she is forced to take the place of her runaway brother, Celestine, in the knights’ squadron! Will she be able to avoid the villainous Crown Prince, Ignis, and survive?!

I am cute, but I was a middle-aged researcher in my previous life?!
Surviving in another world with magic and sciences!!
The orphan Ren was riding the carriage after being sold, when she got involved into an accident, and got her previous life's memories back!
"I was... a middle-aged man!"
Indeed, she was a researcher in his thirties in her previous life, and had been living as an orphan girl up to now!
Ren will make use of her talents in magic and knowledge in science to survive in this harsh world in order to escape from the investor who bought her!

Bi-Kwang is a handsome young warrior who becomes a drooling mess whenever he sees a pretty girl. Out on the road he meets an extraordinary swordfighter with no name who is searching for a legendary master warrior. Bi-Kwang promises to aid the swordfighter if he lets Bi-Kwang meet his beautiful sister. Of course, it turns out the swordfighter is the sister, Hwa-Rin Dahm, and she must switch identities to keep the plot moving along. Bi-Kwang is immediately smitten, and thus we have a triangle involving only two people.

This manhwa was made into a MMORPG.

Makoto and Shinobu are my two childhood friends whom I haven't seen in years, but who had always been admired as being the manliest of men, even when they were kids. I, Ryunosuke, am going to be attending a high class school that was once an all girls school, but has slowly started to admit boys. Makoto and Shinobu were already attending there, so the three of us will now be sharing a room together in the school dormitory. I'm looking forward to the start of my rough but manly school life. However, when I get there, it turns out that they are both girls! GIRLS!! I now have to share a room with two people who I, for my entire life, had always thought were boys! They then tell me that it's a secret that they are really girls and that they've been pretending to be boys. Now I will have to help them keep up this rouse. What am I going to do??!!

Thus begins the story of Ryunosuke's manly school days which will now be filled with days of plumpness, sexiness, and the maximum amount of naughty slip-ups!!

A new relationship begins after a seven year reunion!

After being separated for seven years between Hokkaido and Tokyo, a young man waits at the airport to reunite with his best friend. However, what arrives instead is a message from his best friend saying he will be late, and a mysterious beauty! The ever-spirited mangaka, Hiroki Ohara, makes his debut on Comic Newtype!

"It has been 4 years since the original heroine ended her life as a maid.
A handsome man came to see her.
He was a man who looked like the young lady that she used to serve.

"I'm here to keep my promise, Blair. You said that you'd be with me for the rest of your life."
"No way.... Young Miss?"

At that moment, the man's crimson eyes turned to meet mine.
He bent down till our noses nearly touched and kissed my hair.
And whispered.
In a very sweet and beautiful voice.

"You have to call me Young Master now."

...... Huh?"

Guy dies and reincarnates into another world as the female character he made.


Links:
Original Web Novel: https://ncode.syosetu.com/n7608cw/ (Japanese)

The company employee Osanai is upset, because his superior, a middle-aged man, abuses him at work every single day. One day Osanai ends up drinking his pain away and accidentally buys glasses which promise to make middle-aged men look like beautiful girls. His everyday life changes drastically...

Ralph, the Tyrannosaurus, is the king of the dinosaurs. However, because of a meteorite's impact, Ralph is sent 60 million years into the future only to possess the body of a honours student, Mikobayashi Kana.

In Tulle, a small county threatened by invasion, Freja lives in a small house by the countryside. Aaron and Alexis, two knights who left the kingdom three years before, return, and slowly the gear of fate begins to turn for Freja.

A polite and lethargic boy was reincarnated in another world as a vampire bishoujo. In this world of swords and magic, this protagonist who was reborn replete with all kinds of cheat powers was searching for one thing――! “Three meals a day, snacks and an afternoon nap, I guess.” Are you really the protagonist! And thus begins the fantasy comedy of a vampire looking for the ideal moocher lifestyle…?

A humble man in his twenties suddenly dies and is reborn as the daughter of a duke in an 18th-century lookalike world where magic exists!
He is now living a second life as the adorable "Miranda Mirandiehl," who looks like a doll.
As he was always a "girl inside" with girlish interests, he accepted his reincarnation surprisingly easily.
And so, after being reborn as Miranda, he will enjoy his new life to the fullest!
What kind of encounters await him, and what lies ahead in his gender-swapped otherworldly reincarnation life?

From MangaHelpers:
In this world, there exists individuals known as "Majin": supernatural beings able to wield unique powers. They live among the normal human beings, but the divide created between the Majin and the normal human race is severe. There exists a school known as Dangerous, where the population ratio of Majin students exceeds that of any other high school. In this school, two groups known as the "Banchou Group" and the "Seitokai" face each other in war, but they have created a balance of power, resulting in a temporary peace. Now, with the inclusion of new students, this balance of power is about to collapse. One of the "normal" students, Ryouseiin Otome is forced to choose sides before the beginning of Armageddon.

Two girls who want to become idols are entering into their long dreamed school—Kiraboshi-juku—Kiraboshi Nadeshiko and her close friend Mangetsu Sakurako. These two are so close that despite both being girls, they're often compared to a married couple by people around them.

And so begins their life in the dormitory as roommates. However, on their first night, an unusual, illicit impulse strikes Nadeshiko...

The story follows the High-schooler Futsu Jintarou, whose confession was rejected by his crush.

His misfortune continues, as news of a gender-change disease turns Jintarou into a beautiful silver haired girl. The shock of it causes him (her) to try to escape from reality by playing the VRMMO, Clan/Clan…

His game character Taru uses the same girl appearance as in the Real and the Alchemy skill, which most players call a trash skill.

He meets lots of fellow adventurers, and becomes stronger within the game world of Clan/Clan’s slogan, ‘When one becomes an adventurer, they can fight, steal, control, explore, invent, create, and do anything as they like’.

He meets a wide variety of adventurers that help him(her) grow, Taru hides what happened to his(her) appearance as a bug to his friends who also play the game, and hides the fact that he(she) had become a girl in real life.

When summer break is over, he(she) will have to show their face at school.

This is about one of the best National-class adventurers, the story of the Alchemist who won a war without even taking a single step.

When a normal high school student suddenly turns into a beautiful girl, what would they do?

The answer is to that is to become a net-game addict!