When six-year-old Inés laid eyes on the handsome heir to House Escalante, she promptly made the boy her fiancé. Since noblemen are all the same, she figured she might as well choose a pretty one. But Lord Cárcel isn't ready for this sort of commitment just yet, and he spends the next decade and a half avoiding the marriage at all costs!

Luckily, that's no trouble for Inés, as this marriage failing is exactly what she wants. In fact, he has her blessing to sow his wild oats as long as he stays out of her business. Unfortunately, being a playboy isn't as fun when your fiancée gives you permission. And doesn't this mean she's cheating on him too? Now, Cárcel is determined to change Inés' mind about him and prove he can be the husband she's always wanted.

By some ill fortune, Hikaru died in a traffic accident. He was in heaven standing in line, waiting to be judged, when he took an unexpected request to transfer his soul to a person in another world. He received an ability called Soul Board which he could use to allocate points to Skills to make himself more powerful.

But there was a catch…

「I want you to kill someone for me within an hour. If you don’t, I’ll destroy your soul.」

To pull off the task assigned to him, he poured all his available points to the Stealth skill tree.

This is a story of a boy who specialized in Stealth. With his skill trees as weapons, he would demonstrate his unrivaled strength in another world.

“As long as you’re the master of that sword and I’m a witch, someday you’ll have to kill me for real.”

As a child, Oscar, Crown Prince of Farsas, had been cursed to be childless. At the age of 20, he paid a visit to Tinassha, the strongest witch in the continent, to break the curse. He came back bringing Tinassha along as his protector, and in the one year until his contract with her expired, he got embroiled into her past, and an even greater destiny.

Original Web Novel: https://ncode.syosetu.com/n1488bj/
Official English Translation of the Light Novel: https://yenpress.com/series-search/?series=unnamed-memory-light-novel

From MangaHelpers:

History classes have never interested Saburo. He never saw the point of learning something that happened in the past, let alone a few hundred years ago. But when he falls off a wall, he travels through a wormhole and ends up in 16th century ancient Japan. He meets a very young Oda Nobunaga, one of the most influential figures in Japanese history, who turns out to be identical in appearance as Saburo. The real Nobunaga, sick of the castle life and wanting to travel, orders Saburo to take his place. Without knowing how to get back to his time, Saburo tries to make sure history isn’t rewritten for the infamous Oda Nobunaga. [vyc]

Won the 57th Shogakukan Manga Award for shounen.

Hwajin Na’s teaching techniques are pretty violent for someone who works in the Ministry of Education. That being said, when punishments don't seem to work on even the worst of school bullies, there is no better man for the job. Sometimes you can’t get a good education until those bullies are taught a lesson.

In a distant place, on a certain mountain, a young dragon has been captured by a beautiful female tiger. The two, who were predator and prey, begin a journey to find a way for two animals with very different life spans to live by each other's sides.

TL;DR: Tiger Woman x Dragon Boy

Logan McLain, a middle-aged knight fighting for the independence army, is intent on getting revenge against the empire which took over the kingdom and executed his brother when he ends up dying in battle. But when he wakes, he is a young man again, and has yet to be disowned for his terrible behavior.

Using his experience and knowledge from his past life, Logan recruits a few talented individuals to develop new weapons, build an army, and make enough money to fund it all.

But will he be able to make amends with his family and stop the empire's march?

Tokimori-san is a beautiful and successful woman. But when she's off the job, she tends to be a bit absent-minded! Living together with the charming Tokimori-san always makes me nervous!

Kuroto Hinata is searching for his sister, who "once existed" but is now forgotten by everyone around him. He receives a letter from the beautiful transfer student, Shirai Shimotsuki, stating, "If you want to know about the whereabouts of your sister, come to the library after school." When Kuroto goes to the library, he finds Shirai inexplicably half-naked and waiting for him.

Jahy-sama is an existence to be feared and respected throughout the Demon Realm.

Well, was.

The (former) Demon Realm No. 2 is now busy with house chores and work...in the human realm! Her dinner is just beansprouts, and she can't afford anything except water at cafes, but she won't get discouraged!

The story revolves around people who possess the ability to infiltrate human minds and manipulate memories. Their powers have been used in the underworld for covering up accidents, assassinations, and all manner of crimes. But these powers not only destroy others' spirits, but also corrupt the users' own hearts...

A human boy name Light is kicked out from the adventurer party called the “Race Union(gathering of races)” by his trusted comrades.

Makunochi Ippo is an ordinary high school student in Japan. Since he spends most of his time away from school helping his mother run the family business, he doesn't get to enjoy his younger years like most teenagers. Always a target for bullying at school, Ippo's life is one of hardship. One of these after-school bullying sessions turns Ippo's life around for the better, as he is saved by a boxer named Takamura. He decides to follow in Takamura's footsteps and train to become a boxer, giving his life direction and purpose. Ippo's path to perfecting his pugilistic prowess is just beginning.

Note: Won the 15th Kodansha Manga Award for Best Shounen Manga in 1991.

Kobayashi lives alone in an apartment, until one day, Tooru appeared and they ended up living together. Tooru looks down on humans as inferior and foolish. But having been saved by Kobayashi-san, she does everything she can to repay the debt and help her with various things, although not everything goes according to plan. A mythical everyday life comedy about a hard working office lady living with a dragon girl.

A girl with too much common sense, a boy whose sole ambition is to draw the perfect 2D bride, an addlebrained ghost member, and their always sleeping president — what is wrong with this art club?!

Though Ayase Yuu is the son of a renowned and talented actress, he is below average in anything he does. He is entrusted to live under the care of his mother's friend, and later discovers that he will also be rooming with the three sisters from his school who possess both beauty and talent. Though Yuu thought that an understanding would be impossible to reach between an ordinary person and those blessed with talent, the three sisters are surprisingly...?!

A tale about a modern deep-sea aquarium employee in Tokyo!

What's living in the overwhelming darkness deep within the sea? Take a glimpse into this strange world about a boy working at a deep sea aquarium.

As our humble corporatist Itonami Norio is suddenly summoned to another world, it would look as if he'll be sent to a battlefield-- he, however, holds no skill to speak of, and as he is deemed to be useless. He negotiates with The King and receives a plot of land -- an empty, deserted plot of land, with no inhabitant in sight. Norio holds something he couldn't bring himself to tell anyone: The Master of Supremacy, a gift which will grant him the most comfortable of lives in this world. Hereby begins the Norio's colorful story -- having a mermaid he fishes declare herself his wife, becoming neighbors with the Undead King, this is his busy but enjoyable life -- and now a dragon appears ?!

A period drama set in 17th century Japan ten years after the Battle of Sekigahara, Gaiakitan tells the tale of of Sanada Yukimura assembling his team of ninja, the "Sanada Ten Braves." The story follows a mysterious and talented ninja, Kirigakure, who is reluctantly drawn into Yukimura's rebellion against the Tokugawa clan.

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.