I’d been stanning the hero for 3 years when I was suddenly caught red-handed by his tyrannical doting father, Duke Hades Louvremont.

“Ceaseless pursuit, expensive gifts, and now you’ve come alone all this way up north with no regard for your life…”
“I’m sorry. I have no excuse.”
“Alright, I’ve lost. Your devotion is undeniable.”
“...You think so too? Even I admit that this is the pinnacle of devotion.”
“Many women have pursued me, but none as persistently as you. I stand amazed. Let’s hold it, then. Our wedding. As soon as possible."
“Ha... Yes, I’ll accept my fate.”

Silence.

“Wait, pardon?! What?”

What did he just say?
Surely I must've misheard?
But the duke, smirking at my shocked face, gave the finishing blow.
“I said, I’ll marry you.”

Wow.
The hero’s dad has an inflated ego.

As an elementary schooler, Araki Yuuhei saw a live music show and was deeply inspired. Now in middle school, he reunites with his music-loving friend Matarou and gets a strange crescent-shaped guitar. From there, Yuuhei becomes obsessed with guitar and ends up performing at his first live show with Matarou!

Shimazu Toyohisa, a real-life samurai who fought in the pivotal Battle of Sekigahara. In his dying moments, Shimazu is transported to a world of magic with other famous warriors throughout history. These warriors are forced to fight each other in an endless battle.

Note: Nominated for the 4th and 5th Manga Taishou Awards.

From Transcendence:

On a hill overlooking the sea, in a town that retains its old-world beauty, a new and gentle love story begins!

Kashumir grew up working as a mercenary to buy medicine for her precious younger half-sister, Aria.On her way home, after completing a mission as usual, she tripped and hit her head, causing her to remember her past life; thus she realized she had been reborn in the world of the novel *The Night of the Fairy*. Her sister was the main character of this reverse-harem romance while she was one of the villains causing Aria to suffer hardships.Since there is no way Kashumir would let her precious sister suffer, she vowed to protect Aria until her adoption into the count's family, just like in the novel.But things turned out differently, and even the male lead candidates, who should've been fish in Aria's pond, all ended up becoming obsessed with Kashumir instead, when all she wanted was to protect her lovely sister.

Gone are the days of swordsmanship and chivalry. Now is the age of gunpowder and war. Our story has two players. The first is Orcsen, a unified nation with many demonic races, led by the oft-reviled orcs. And the second is Elfind, the kingdom ruled by the beautiful yet vainglorious elves. Dineru, chieftain of the dark elves, has been forced to flee her homeland from enemies she had once trusted as friends. In the midst of their forced diaspora, she has a fated encounter with the leader of Orcsen, the orc king Gustav...

"I've been cheating on you. Oh, and it's not just one guy. It's three. Sorry about that."

Back in middle school, Akiyoshi Sunao's first-ever girlfriend shattered his heart, and he swore off love. However, all that changes when he develops a crush on a girl in his university's film club. Just as he's finally beginning to move on from the past, he bumps into his ex-girlfriend. Little does he know that this is only the beginning...

To his horror, he wakes up in her body the next morning!

When an entire bus of people are summoned to another world, Souma Nagi doesn't go along with the idea of being a Hero like the rest. Thus he leaves the palace and starts his life in another world with his ability to restructure skills. Based off the Light Novel by the same name.

Ash is a young boy with apparent past-life memories who lives in a remote, deserted village. As he remembers leading a bountiful life, he can’t bear living in a world akin to the Dark Ages, where not even the internal combustion engine exists. Ash envisions the rebirth of a civilization where housing with proper sanitation is the norm and the world is connected via a means of transportation faster than horses. For that reason, he is eager to consult books containing knowledge from a highly-developed ancient culture that is rumored to have existed far in the past. Ash makes use of the church’s resources, learning how to read and obtaining the knowledge that he seeks. In addition, he enlists the help of the people around him, including Maika, the village chief’s daughter. Together, they aim to develop their own village. This is only the beginning of the story about a young boy who sets out to revolutionize the world in order to rebuild civilization and create his ideal life!

"Kouji-kun, I want to see you have sex with another girl."

Even though this will drive my mind and body further into a corner, I just can't hold back my feelings of wanting her to love me...

(Source: Ganma)

Who says revenge is vain? It's so fun!

In a world where magic is extremely advanced and boasts a civilization that is no different from science fiction, he has reincarnated into the noble 'Rondel' family.

However, born as the child of a commoner concubine, his life is threatened by the first wife and half-brother. He acquired the role of 'Manuel Lucas', the great mage who changed the world. And a refreshing revenge story begins!

'From now on, I'm going to live the life I wanted'

Takina Inoue, a high school girl working as a member of an all-female taskforce of assassins and spies known as "Lycoris" dispatched to eliminate criminals and terrorists in Tokyo, is sanctioned by her superiors at the DA agency for disobeying orders in order to save a colleague. She is transferred to work with the elite Lycoris agent Chisato Nishikigi at one of the agency's branches, which operates under the cover of a cafe, called "LycoReco".

One day, Sylva realized that he reincarnated into a mob soldier from the game that he was hooked on in his previous life. Even though he utilizes his game knowledge to do his utmost best to survive in this dangerous world, he opts to hide his true strength in order not to throw the scenario into disarray. However, an unexpected turn of events led him to easily defeat a powerful demon that even the hero is hard-pressed to defeat. And to make matters worse, he did that in front of his favorite heroine in the game... Upon this incident, word started getting out about his true strength...!

One year after the war against King Glenn, a rebel army known as the Knights of the Fallen King has unleashed havoc throughout Szaalenden, seeking to revive Glenn! Is the war set to begin anew?

From Must Be Endless: A boy who is easily roped into things & a cool beauty who is a natural asshole.

Emperor Ludis, Unfortunately passed away due to "Emperor's mark" (which subjugates "Magic Beasts"). 1000 years later , Ludis reincarnates into a person who should have died. Ludis, chained by rules in his previous life, will become an adventurer and travel around the world to live freely. He may appear to be an ordinary adventurer but behind the facade he is the strongest magic beast tamer. Together with his companions, he begins his wild journey in another fantasy world full of magic beasts.

Original Web Novel: https://ncode.syosetu.com/n1188ff/ (JP)

"Only do good deeds."

Asura follows his late mother's teachings and always strives to do good in life. No matter how much he is bullied, he goes on with a smile, firmly believing that evildoers will receive divine punishment.

Until one day, an ominous old man offers him a key that can open the doors to hell...

The son of the world's top assassin organization leader, Doyul, has transferred to a Korean high school!

Coming in with nothing, Doyul takes on a request from Dong-gu, a victim of school bullying, and begins taking down the local delinquents one by one?!

The story of a man who rises to become the strongest in the War Against Bullies universe!

I am a sickly person who vomits blood whenever I get stressed. Deon Hart. However, at the same time as Honorary Count Hart, who is somehow misunderstood as strong and feared by everyone in the Empire, In the demon realm, he became the commander of the 0th Corps, the most trusted by the demon king... Yes?! me? I'm not that kind of person?!

Helck Sequel

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Author's Twitter: https://twitter.com/piui_nanaki