I, Cardinal Brauz, am a reincarnated person. How should I put it, I was reincarnated as a villainess, probably!! Due to an unexpected event, I had regained the memories of my former life. I was someone who immersed herself with light novels! What’s more, I also never played an otome game before! But, I probably have been reincarnated as a villainess? By the way, how should I carry myself as one? Anyway, for the sake of facing the destruction end, I will do whatever I can for the time being!

Pairing: Ekubo x Reigen Arataka

Pairing: Kogitsunemaru x Mikazuki Munechika

Choi Kanggo was born with a sensitive nose that can smell through a person's feelings. But when a boy who likes him approaches...?!

Original Webtoon:
Main Story: Bomtoon, Lezhin, Ridibooks, KakaoPage, MrBlue, Naver Series, Blice
Side Story (R19): KakaoPage, Ridibooks, MrBlue, Naver Series, BookCube, Toomics

Official Translation:
English: Manta
Japanese: Beltoon, Lezhin, Piccoma, Comico, Renta
Others: French, S.Chinese, Thai

The isekai fantasy tale of a young man sucked into another world, where he must roleplay an old man in a young woman’s body!

Sakamori Kagami has awakened in the world of Ark Earth Online, a game he plays religiously. The catch? Instead of his normal avatar–an old, bearded sorcerer–he finds himself in the body of a girl! Now he must convince the people of this world that he–she–is a pupil of the legendary wise man who vanished without a trace thirty years ago.

Source: Seven Seas Entertainment, Vol. 1

Rengo Orii loves superheroes. Other people say that his favorite, Megalith, is an old man who should just retire already, but as far as he's concerned, anything Megalith does has to be true justice.

One day, a bizarre encounter leaves Rengo with the power to transform... not into an awe-inspiring superhero, but a horrifying insectoid monster! Rengo realizes that even though he might not look the part, he can still be the superhero he's always dreamed of being now, but it turns out copying Megalith's signature knee to the face isn't such a good idea when you're strong enough to kick someone's head off! Can a monster with a little kid's sense of justice really be a hero!?

(taken from Batoto)

Pairing: Kaito Kid x Kudo Shinichi / Edogawa Conan

From J-Novel Club:
High-schooler Ryoma Mikoshiba finds himself summoned to another world by the warmongering O’ltormea Empire. But Ryoma is no ordinary school boy – he has both talent and training in martial arts. Using his skills in martial arts to escape captivity and swearing revenge on the country that summoned him, Ryoma finds himself in a world where he can become stronger by absorbing the life force of whomever he slays – a world that fits his talents to a bloody T. Pursued by the O’ltormean court for killing an important official, Ryoma attempts to flee the border while keeping his identity hidden. But as he does, he encounters two twin sisters - Sara and Laura - an encounter that will change his fate. And so begins the epic tale of a young man and his journey of war and domination!

Original Web Comic

Yuito didn't have a good first impression of the new transfer student, Tagasaki Mitsu, who bit him on their first encounter. There are a lot of rumors about Mitsu's violent ways, will Yuito find out whether they're true or not?

From Chibi Manga:
Tsukimori-kun is clever, hard to associate with, and his eyes behind the glasses are really cold. Everyone in class scared of him, but I’m not the same. that’s because i have a reason…

You, who came back on a rainy day, I think I like you.

Soyool, who is having a hard time getting to know people due to past trauma, seems to have fallen in love with Kim Hwon, whom she met as she entered high school. Can Soyool overcome her trauma and achieve love?

Original Webtoon

The First Version and Remake are combine on the same page.

Pairing: Conan x Ai

Original work on Pixiv

Pairing: Haiba Lev x Yaku Morisuke

After a car accident, Taemin finds himself in the body of Siwon, who was a victim of bullying at school. No longer a pushover, he starts standing up for himself but then meets Woojin, an old friend from the past. Somehow, Woojin immediately picks up Tamin's 'scent' from Siwon. What happened between these two in the past and how will it affect their future?

Official PV
Original Webtoon

Official Translations:
English: Lezhin, Tappytoon
Japanese: Lezhin, Beltoon, Piccoma
Others: French, Spanish

Tappytoon uses Lezhin localization

Pairing: Daichi x Sugawara

From Procrastination Scans:

V2:
Daichi needs some help to study for his university exams and Suga is more than happy to help our his beloved captain.

Trained fighters known as Bastioners battle against invaders from another world using a mysterious power called Aegis. Aegis can grant people and objects tremendous strength, but people are unable to use it on themselves and must therefore always fight in pairs to give each other power.
Yorino Aratsugu and Yoko Kaminoi are two young girls training to become Bastioners. Yorino used to protect the timid Yoko from bullies, but now Yoko has surpassed her at everything other than combat skills. As the two of them become full-fledged Bastioners, Yorino must fight to keep herself from becoming fully eclipsed by Yoko's talents, while also struggling to understand the more complicated feelings she has for her childhood friend.

Meet Toya Kimishima, who's always surrounded by girls, and Keisuke Kano, who hates girls. They're complete opposites and look like they wouldn't get along, but they have a secret relationship. However, they've promised never to talk to each other at school... At their age, a single kiss revs up their libido. Getting upset and annoyed when seeing the other be friendly with other people, or getting frustrated thinking they're the only one jealous... This is a sweet teenage romance about two high school boys!

A high school student Zheng Lang reincarnated into an ant after the death. The world he lives now is another world, which is under the control of monsters. One day, he ran into some people who accidently intrude this world and they became friends later. A new and exciting journey is waiting for them…

(Source: MangaDex)

Original Manhua:
AC.QQ, BiliBili, KuaiKan, IQIYI, ManmanAPP, Mkzhan, Mangatoon

Official Translations:
English (Mangatoon, Webnovel), Vietnamese

From Sekai Scans:
Rin was a certified yankee on her first day of High School when her brother dyed her hair blonde as a prank. On her way home, her hair got stuck on the bracelet of famous hair stylist Hanae!
With no way to free her hair from the bracelet, she ended up cutting her hair off!
Hanae said he’d take responsibility for damaging her hair... but what does that responsibility have to do with marriage?!

In grade 6, Choi Hyuk killed someone. He then promised his mother that he would never fight again. He spent his school days being bullied and blankly staring out the window.

One day, a ring appeared in the middle of his classroom.

Choi Hyuk, now a high schooler, who had spent his whole life atoning for his sins was now faced with a decision, to kill or to die.

Reprinted in ECG Katsudou Tokushuu 2015-2018

Kohara Sunao, a high school junior who can't approach boys and has never been in love, finds herself sitting, during classes, next to Izumi Aoto, who is cool, silent and scary. By coincidence, they start soccer training together. A "special lesson for falling in love" starts between a super tough boy, and an obedient and bright girl!

Yukimura Shinya and Himuro Ayame are two scientists that want to find out if love can be solved by a scientific theory. These two scientists also have feelings for each other and want to be able to understand their feelings through similar theoretical facts. With this perfect opportunity, these scientists will attempt to solve the theory of the love they express for each other. An experimental-sciences love comedy with laughs and kyun kyun with the laboratory where individual researchers come together as a stage.

Online Comic on Ganma!

The school nurse, feared by everyone, with her white underwear peeking out of her black tights.
And then she caught me peeping at it….. Thus began the s.e.c.r.e.t afterschool counseling.

A deformed high school girl escapes from a mental hospital and starts to hunt down her former schoolmates who cruelly bullied her.

https://www.cmoa.jp/title/186321/