A high school girl is trying to get obsessively close to her kind stepdad. Even going as far as watching him in bed with her mom.

My peaceful school life… is officially over.

Izumiya Ryouta, an introverted otaku, suddenly finds himself surrounded by the top three beauties of the class after a seat change.

In front of him sits the little-sister-type Miyama Airi. To his left, the cool and detached gyaru, Ichinose Yuria. And to his right, the refined, black-haired class rep, Kuroki Ruri.

On the surface, they’re flawless beauties—but Ryouta stumbles upon secrets that none of them can ever let out…

"P-Please…! Just don’t tell anyone about this!"
"From now on, we’re in that kind of relationship."
"This is a secret… just between you and me, Ryouta-kun."

All he wanted was a quiet otaku life—so how did things end up like this?!

Caught between three troublesome girls, an introverted otaku desperately fights to avoid any more chaos in this love-comedy showdown!

Reaching his limit due to daily work, the corporate slave Enami Shuusuke collapses on the station platform one day. In that moment, memories of his childhood friend, Yorumiya Hina, who died in an accident, flash before his eyes.

"I'm sorry, I couldn’t save you then."

As Shuusuke falls into a deep sleep bearing regret, he finds himself time-leaping back 10 years! Thus begins the time-leap rom-com of a corporate slave reliving his youth in order to save the childhood friend he couldn't save 10 years ago!

While on his way home from an interview, unemployed, unmotivated, jaded 18-year-old Inumata Shinogi encounters the beautiful lady and evil spirit Yaergnacht Finsternis. She demands him to either marry her or die on the spot. He must command the battle against enemies of humanity, the apostles of God (Highlanders), and save the world with his wife!!

Ryuuto Kashima is a gloomy high school student. Because of a punishment game, he was forced to confess to Runa Shirakawa, a girl from the top of school caste and admired by everyone. They ended up going out for the unexpected reason of "Err, I'm free now so..." but, Ryuuto ends up following and eavesdropping Runa getting confessed by a handsome soccer club member, and Runa bringing Ryuuto, whom she just started dating, to her own room as a matter of course. They have different friends and ways to have fun, different in just about everything. And yet, surprised by their differences everyday, accepting it, they begin to relate with each other. A love story that will make you feel wonderful when you read it, starts now!

“Let’s start a strategy meeting for making friends.”

This is a story about her and me. It’s the worst and the best second-life high school rom-com ever.

Love, friendship, and the sparkling joys of youth. The high school life that I’ve looked forward to- still ended with me being alone. Then, just a day before the graduation ceremony…

“Don’t die! Nanamura-kun!”

Sora Hanamitsuji, she’s a beautiful girl that even models can’t compare to. My life ended after getting hit by a truck to protect her. …That should’ve been the case.

“It must be because the gods got bored.”

However, with this accident, Hanamitsuji-san and I returned to the day of our high school’s entrance ceremony. The second high school life is no longer as charming and youthful. I was going to spend it modestly and alone. …But, she said that won’t do.

“Well, I’ll help you make friends.”

This is a story about my second high school life. It’s the worst and best teenage rom-com ever.

Ordinary office worker Oohashi Rei wakes up in the body of the protagonist of her favorite otome game, Revolution. To her delight, the first person to greet her is also her favorite character, Claire Francois–the main antagonist of the story! Now, Rei is determined to romance Claire instead of the game’s male leads. But how will her villainous lady love react to this new courtship?!

Links:
Author's Twitter: https://twitter.com/inori_narou - Tweets in English, Japanese, and Korean.
Artist's Twitter: https://twitter.com/aonoesu - Tweets only in Japanese.
Official English Novel: https://sevenseasentertainment.com/series/im-in-love-with-the-villainess-light-novel/

A girl who calls herself a devil appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under an unfair pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

A sweet cross-cultural romantic comedy tale about a lesson exchanger from a beautiful foreign country, and the young man who takes care of her dinner.
Katagiri Naomi, a high school student who lived alone for two years, finds a beautiful girl with black hair, and blue eyes, who moves into the apartment next door. The girl's name is Yui. It seemed that she really was a noblewoman, and her nickname was “Quderella” because of her nonchalant attitude at school. Naomi knows that Yui doesn't want to depend on others, but she's actually quite naive, so Naomi decides to help her.
"Today what are we having at night... Karaage chicken, huh?"
"That's right because the price of chicken is discounted today"
“I love your fried chicken so I'm really looking forward to it”

This is the beginning of a sweet and tantalizing relationship between the girl and boy who lives next door.

The Hero’s party was attacked by a large group of powerful devils. The party will no doubt be annihilated if this were to go on.
One member of the party, the strongest mage, Rakku decided to stop the enemies in their tracks.

Meet the Evil King Valt, ruler of the Continent of Darkness. After being defeated by a group of heroes, he was reborn as a human, with his powers intact!

"I'll start over in this world. And this time the whole world will be mine!"

Valt garners the attention of the elite adventurer Iris. With Iris as his guardian, he enrolls at the Royal Adventurer Training School and immediately surpasses his seniors with his abnormal power! In an unprecedented move, this maverick is designated "level 0." He goes on to employ his talents as an Evil King to great effect, dominating the new world he finds himself in...

An elemantary schooler, Usami Kyuu encounter Ichiko, a female robot trying to learn about [heart]. What awaits the two that start to live together... Boy X Robot Girl, Begin!

Shinichi Kudo is a high-school student who, by using observation and deduction, is good at solving mysteries. While investigating one, he is caught by the criminals that he was watching and forced to take an experimental drug. Leaving him for dead, the criminals disappear. Instead of killing him, however, the drug turns Shinichi into a little kid.
To preserve the illusion of his 'disappearance,' Shinichi adopts a new name based on his favorite author (Arthur Conan Doyle) and becomes Conan Edogawa. Ran, his (actually Shinichi's) childhood friend takes this little boy under her wing and brings him to her home.
Conan now lives at a detective agency run by Ran's father, but his mind is as keen as ever and he continues to solve mysteries... always allowing Ran's father to take all the credit.
As far as everyone's concerned, Conan is just a little kid anyway... even to Ran. This is *extremely* frustrating to Conan since nobody will listen to a 'little boy.' Despite this, Conan has a mission... to find the criminals who did this to him and get the antidote to that drug.

Note: Won the 46th Shogakukan Manga Award in the shōnen category in 2001.

When I confessed my love to Sasaki-san... she's floating!? But only by 1 cm off the ground...!
From the novel posting site "monogatary.com," a mysterious youthful romantic comedy about Sasaki-san, who can use a little bit of amazing magic, and me! (From Comic-action)

After losing his girlfriend to a brave hero, Toru is expelled from his S-Rank party. With a feeling of sadness and pain in his heart, he defeats a demon he meets outside the city, and his ability [to save experience] is broken! Toru becomes level 300 in the blink of an eye! With this power that far surpasses that of heroes, there is nothing that can stop him. Kaede, a slave he met on his journey, forms a group called the "Mangyu Brigade", and easily completes dungeons, acquires the legendary sacred weapons, and thanks to his skills, his friends level up easily! He rescued a countess who was attacked by bandits on the road, and befriended a legendary beast. Oru's journey continues at a leisurely pace, as he repeatedly encounters various people along the way, while his former party of heroes are deprived of opportunities to play an active role and fall into decline. This is the beginning of the life of a 300 level warrior!

Original Webnovel: https://ncode.syosetu.com/n9483ge/

From Nyan-Nyan Rampage:

"The final arc of the story begins...

When Takao Osugi receives the mysterious "Universe of the Four Gods" book from his mentor, Einosuke Okuda, he does everything to keep it away from his young daughter, Suzuno. But when disaster strikes Tokyo, can he still protect her from her fate?

Shortly after the tragic finale of Genbu Kaiden, young Suzuno Osugi's tale as the Priestess of Byakko beings to unfold!"

The high school freshman Kishino Mamoru was expecting a fateful encounter and he met the pretty girl classmate Oshii Koko, and happened to know her secret. To his surprise, he found out Oshii-san's bladder is super weak...!! To not 'leak' this secret, Kishino Mamoru swore to protect Oshii-san('s bladder).

Alba is happy living a quiet life deep in the mountains... until the day he accidentally saves a beautiful girl — an act that shatters his plans completely. As fate would have it, this girl is one of the key characters responsible for his death in the game's original story! Now dragged into the elite academy where the game unfolds, Alba must dodge danger at every turn if he wants to stay alive.

As the red-headed princess of Kouka, Yona lived the ideal, though sheltered, life within the walls of Hiryuu (Red Dragon) Castle. Doted on by her pacifist and cowardly father, King Il, and protected by her childhood friend/bodyguard, Son Hak of the Wind Tribe, (who has loved her since they were kids, but keeps his feelings in check). She cherishes the time she spends with the "love-of-her-life" (and older cousin), Soo-won. Though, on the night of her 16th birthday, everything changes when she witnessed someone close to her, murder her father.

The main character was possessed as Baeklee Yeon in the world of martial arts, the foolish and annoying daughter of Baeklee Ee-gang, a complete body and teacher who leads the male protagonist into the right path of becoming a hero.
She was killed unexpectedly, and when she opened her eyes, she regressed to her childhood days where she could undo everything.