Despite being from a prestigious noble family, Bridget, a failed daughter who made a contract with the weakest spirit, one day had her engagement broken off by the third prince, Joseph.

However, no one sympathized with her, who was acting as a proud daughter at the behest of Joseph... At that time, Bridget meets the Duke's son Yuri, who is feared by those around him because of his overwhelming ability and cold personality.

Two people who hate each other and repel each other. However, the encounter gradually changes their destinies. This is the story of a villainess who is despised for being incompetent and a villain who is shunned for being a genius who eventually fall in love.

Web Novel: https://ncode.syosetu.com/n9923hb/

With the laboratory, where individual researches come together, as a stage, an experimental sciences love comedy with laughs and kyun kyun, drawn by Yamamoto Alfred. 

Ever since she was young, Nonoka always dreamed of watching the end of the year Countdown with a boyfriend. Now that she's in high school, she wants one! However, there's no signs of getting a boyfriend anytime soon, and it's already December.

The cool, lone-wolf girl and her precious, unrequited crush!

(Source: Ganma!, translated)

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/

The manga centers on Yūma Fujikura, a constantly bullied first year high school student. When a classmate named Ryō Ameri, nicknamed "Amelie," helps him out one day, Yūma tells him not to get any more involved, or else the bullies will target Amelie too. In response to this, Amelie only tells Yūma that he would commit murder for him if Yūma wanted.

Amano, who returned to the city where he lived as a child for the first time in 10 years, meet Yukio Sawatari, a childhood friend on the first day of transfer, when he (a male friend) turned female! Although she shares her joy, as she suddenly turns into a girl and cannot hide her embarrassment. Yukio was affected by an illness like 100,000 other people, suddenly becoming a girl so-called " spontaneous isomerism metamorphosis ''!

The female childhood friend ♂ is cute and in trouble!? Forbidden TSF (transsexual) Love!

By the time he opens his eyes, Kubota Tamotsu (34 years old) has been reincarnated into another world. Moreover, as a 6 years old slave with “Level 1 Barrier” skill. To surpass his limitations and become a powerful Barrier master Kubota begins a hellish training, full of obstacles and struggles. — From “Let’s Become a Novelist”, a new other world fantasy starts!

This is comic about a high-school student's convenience store and OL (+ α). There is age difference & height difference.

I would die if it would allow me to touch you. That is my love. Airhead Yuri-chan and her boyfriend Aono-kun had a perfectly normal relationship until one day Aono-kun suddenly “passed away” … They will never be bound together, and they cannot even touch. This is their difficult and almost too sincere love story.

Kazuya Kagami never goes anywhere without the precious Sakura Obi his mother gave him. One day a beautiful, kimono-clad girl named Kiriha appeared before him. Kiriha naturally began to live with Kazuya in his room. Then there's Chisato, Kazuya's childhood friend with glasses and a ponytail, who meddles in his affairs. Soon there's also an overprotective older sister who seems to want to take baths with him. Jumble in a huge-chested priestess, a good-looking sorceress named Kokuyoura, beautiful women, and hot girls, and Kazuya's happy, embarrassing, confusing life begins.

As a result of a large war, the world was eroded by a magical infection that distorted the time and space around it. Though magic has been outlawed since then, the effects of that war still remain. To uncover all the secrets of the world, "Lucky Solte," begins her adventure.

Continuation of Kamen Rider Spirits after the series changed magazines, Shin Kamen Rider Spirits follows the war between the evil Badan Empire and the 10 Showa Kamen Riders and their allies.

The protagonist along with his step-mother, and 2 step-sisters are summoned into another world where demi-humans are the rulers as saviors, but its not to fight against a demon lord, its to fight an Undead Apocalypse monsters called "Dead Mell" that have overrun the world and that can only be killed by using weapons made with holy silver.

For that, a familia is made (group of 4 people) with them being the swordmaster that uses the holy sword, the guardian that uses the power of earth to protect, the healer that use the power of water to heal and the black mage that uses the power of fire to destroy.
The role of the guardian, the mage and the healer is to support the swordmaster that can only kill the monsters.

But to use magic powers one must offer part of your being as a sacrifice to form a contract with spirits, and the higher the sacrifice, the higher the power. Now they must choose who are the 3 that need to sacrifice part of their bodies to gain power and who will wield the holy sword.

From MangaHelpers:

Utilizing a system called "Sense," each player aims to create their unique character in the VRMMORPG "Only Sense Online." Joining this realm is Yun, an absolute beginner in the world of gaming, equipped with some of the worst customized "Sense" ever. While his two sisters, both veterans in this world, criticize his choices of equipment, he continues to delve into the skill sets he has acquired. Along his way, he meets the art of "production" and people that have mastered this art. Watch as a total novice creates a revolution in the gaming world and create the "ultimate" support class. [DrCoke]

One day, a dull young man from Japan gets caught up in a heroic summoning and goes to another world. The next time he wakes up, he's not in a castle with a king, but in a deep forest since the summoning failed! You'd think he'd be at a loss, but he starts living a life of survival with a positive attitude that doesn't involve deep thought!
Then, before he knows it, he saves the cursed forest and magical beasts one after another with his magical powers, and is befriended by wolves and dogs in a healing paradise! However, he doesn't realize that they are actually legendary demonic beasts and spirits at all. What's more, that they are adored! A positive young man unknowingly plays with the legendary magical beasts, a heartwarming and misunderstood fantasy begins!

One day, when I was making school supplies in the art room, a very scary-looking girl was staring at me...!? Crafts girl vs. art boy romantic comedy!!

“You just die one day and turn into a mummy!” Mysterious mummified corpses that people have nicknamed “Mummily-sans” keep being found one after another, causing a lot of fuss. One day, a boy named Seita notices that his friend is acting strangely…?! Don’t miss this thrilling suspense story about an invasion by the unknown!

It has been seven years since Sora Ono was sent to another world, where she was enslaved. Because of a clerical error, her “slave” status was revoked, and Sora walked away a free woman. Then one day, she purchases a slave...

In the era of space exploration. Mankind is at war against monsters of unknown origin. The battle is grim, and the future looks bleak. Amidst the chaos, mankind plays their last hand; it's time for the Knights to step into the fray and turn the tide of this war.