Leon was reincarnated in the world of an otome game that he was forced by his sister to conquer just before his death. He tried to live a peaceful life as a mob character, but he encountered a scene where a female student ignored the flow of the story and tried to become the main character. Leon ended up seizing Marie, a girl who had a similar atmosphere to his sister from his previous life, and succeeded in thwarting the scheme. It should have have been the right choice... but why was he feeling uneasy about it?

From MangaHelpers:
Nogawa Izumi is a good student, and a class representative, but she has an increasingly high libido. It's gotten to the point that she'll claim to feel bad during class, so she can run to the nurse's office and masturbate. When she learns that the Earth is being invaded by aliens that look like people dressed up as animals, it turns out her high sex drive may be able to help protect the Earth. The first time Izumi is attacked by the aliens, she is rescued by Usayama, a bunny alien whose race was their previous victim. Usayama gives her a swimsuit that will allow her to fight the aliens, but which also sends her constant arousal through the roof. The scientific organization that Usayama is affiliated with think that Izumi, with her high erotic level, may be the person they've been looking for to fight the aliens. Will Izumi be able to save the Earth?

A male to female ratio of 1:359?! Saotome-kun is admitted into a school full of gyarus.

Maeda is a new student in the Teiken High School. He stutters when he's nervous and he's rather clumsy. He gets noted immediately because he hits a teacher during the entrance ceremony. Some clubs search to enlist him as they see in him a force they can use to get even with other clubs. But Maeda is a loner and has only one dream: becoming boxing champion. His first objective is to beat the leader of the boxing club. "Rokudenashi" translates as "good for nothing".
The manga focuses more on gang warfare than boxing.

I killed the player.

He was a real son of a bitch…

He loved me too much and was a sociopath.

Now that I'm back in time, I'll kill him before being manipulated again and save the harem's girls who will help me win the video game's scenario!

The popular gal who was my childhood friend is secretly uploading provocative selfies!? In his quest to uncover the secret of this popular girl, high school boy Riku discovers that his own deeply hidden emotions were being observed by someone else… A sweet yet suffocatingly intense blend of youth, love, and suspense.

A story about an unattractive second-year student, Sakagami, being teased around by a mysterious first-year student who is good at fortune-telling, Mizuki-senpai… But at the same time is actually showing signs that she likes him…

A frustrating and strange love-comedy begins!

Hinowa Tomari is a normal high schooler, until one day he's told that he has to become the wife of a mysterious creature called Kanenogi.

This is the start of their newly married life.

The bullied loser Kim Jaehyuk receives 'Top 1 Fighting Tutoring'!
Kim Jaehyuk is a high school student who has been living in despair under the torment of bullies. He's good at studying, but he'd rather be good at fighting.
Then, as if by fate, a 'fighting tutor' comes into his life!

A HEAVENLY ENCOUNTER!
Mahiru is a beautiful girl whose classmates all call her an “angel.” Not only is she a star athlete with perfect grades—she’s also drop-dead gorgeous. Amane‚ an average guy and self-admitted slob‚ has never thought much of the divine beauty‚ despite attending the same school. Everything changes‚ however‚ when he happens to see Mahiru sitting alone in a park during a rainstorm. Thus begins the strange relationship between this incredibly unlikely pair!

Park Han-jun, once called a legend, was frustrated because he had nothing to lose anymore is given a huge amount of money.

An eye for an eye. An eye for a tooth! I’ll make you pay for what I’ve gone through!

As his rage explodes, he’ll get his sweet revenge and make them pay as much as they deserve!

Ooyama-kun normally doesn’t get involved with Akutsu-san, a delinquent girl in his class, but for some reason she makes his house her hang-out place! Will Ooyama do something horrible to her behind closed doors or will he chase her out? But dealing with Akutsu-san’s sexy, cute behavior in such a confined space… he’s sure to get flustered! He wants her to go home, but he doesn’t? A teasing comedy under a single roof!

Note:
Yankee Musume (ヤンキー娘) is the pre-serialization name

Links:
Artist's Twitter: https://twitter.com/NAGAOKA0
Artist's Pixiv: https://www.pixiv.net/member.php?id=133935

I, Maehara Maki, someone who couldn’t make any acquaintances or friends in high school, finally had someone I can hang out with outside of school. A girl.

Her name was Asanagi-san. The boys in my class called her ‘The class’ second cutest girl’ behind her back.

On Fridays, she would refuse her best friend, Amami, ‘the cutest girl in class’ invitation just to hang out in my house with me.

Together, we played games, watched some movies, read some manga while eating junk foods like pizza and hamburgers, and chugging cola without a care in the world. To others, we may seem sloppy, but it was a precious, secret time together for Asanagi-san and myself.

"If he wants to go wild at the ice skating rink, isn't he better off as an ice hockey player?"

The stage is the proud land of the north - Hokkaido.

The year is 2010. Rou Shirakawa has just received the highest score in history at the All-Japan Junior Figure Skating Championships! But suddenly, he loses control and starts destroying the stage. He is quickly disqualified and banned from the skating world for life.

Now nicknamed "the Rabid Prince," Rou ends up in Tamakomai, an ice hockey town in northern Japan. And on a hockey rink on a frozen lake, he meets the ruthless Genma brothers! Rou will soon learn of the famous Oino-kami high school and their quest to win an unprecedented 20th straight national hockey championship. And also the strong, yet beautiful battle sport - ice hockey!

Change, grow, evolve! Turn defeat into victory in this red-hot redemption story!

Local bullies tormented Kotaro when he was a youngster.
They were the skilled wrestler Akari.
Kanae, a basketball prodigy, and Shigure, a prodigy in video games.

Every day, Kotaro competed against these three guys in their respective sports with the intention of winning. Unfortunately, he was no match for them.

As a senior in high school, Kotaro now has another opportunity to confront them and exact his retribution...!

But he will discover a secret that he never would have expected....

Jesus is about a high profile assassin who plans to fake his own death, laying low from all the mafia hitmen and the FBI that are after him. He plans to live the rest of his life with the money he could get from smuggling the drugs he stole from the mafia gangs - one of the reason he is chased. His plan fails and he couldn't get those drugs his old time friend hid for him, because they somehow happened to be concealed in a school's wall, with a super strength blackboard in front of it.

He has no choice but to pose as a high school teacher to guard his stash, trying his best not to get caught while being involved in crime cases.

Yuuki, a transfer student, is Aida's neighbor, both at home and in the classroom. Aida tries to get friendly with Yuuki, but their conversations lead nowhere. On the other hand, when it comes to their situation as neighbors, Yuuki...

Born the son of a mercenary in the war-torn north, Almark sets out on a long journey to the Nork Academy of Magic in the south to fulfill a promise he made to his father to become a sorcerer.

After a long journey, his life at the academy was completely different from the world he was in. Almark is always confused by the gap. However, while making mistakes, with the help of his colleagues and teachers, he gradually shows a glimpse of his talent.

With the pride of being the son of a mercenary, Almark takes the first step toward becoming a sorcerer.

Komi-san is the beautiful and admirable girl that no one can take their eyes off of. Almost the whole school sees her as the cold beauty that's out of their league, but Tadano Hitohito knows the truth: she's just really bad at communicating with others.
Komi-san, who wishes to fix this bad habit of hers, tries to improve herself with the help of Tadano-kun.

Note: In 2022, the manga won the 67th Shogakukan Manga Award for the shounen category.

Uchida is a high school student genius who created a device that is supposed to make people have good dreams but he always had bad dreams when he tried it on himself. One day, he caught the school doctor sleeping at the clinic and decided to try the device on her. It turned out that it works surprisingly well on her and that she wanted to buy the device from him. He then tries it on his classmates and it became quite popular with the rest of the class as people start lining up to borrow it. Meanwhile, there is growing concern that users of the device are starting to have difficulties differentiating dreams from reality.