After the events of Baki-Dou, the famous Kenpo master Retsu Kaioh wakes up in a new world unknown to him.

Note: This is the official entry, not to be confused with the Doujinshi from Twitter user @sakuramankiti. As of now there is no official cover so the December 2020 issue of Monthly Shonen Champion is being used instead.

From: Easy Going Scans:
Glory is won over the roar of cannon fire, and peacetime exists simply to prepare for the next battle.
A soldier in a militarily-advanced nation, Balzer had no problems gaining rank. However, his career takes a sudden turn when he's assigned as an adviser at a military school in a neighbouring allied nation. Struggling to manage with minimum military power at hand, inexperienced students to take care of, and civilian opposition against firearms to alleviate, will Major Balzer be able to win over the other soldiers, his charges and the civilians?

Junpei is happily snoozing away during his sister's ballet recital when a male ballet dancer steps onto the stage. Moved by the strength and skills the dancer displays, the boy discovers his love for this art.

But after a certain tragedy happens, he vows to leave his past behind and turn into the epitome of manliness. What will he do when his love for ballet reignites?!

A C-rank killer from the assassin organization “Glory Club,” Byun Hogil somehow ends up becoming a lawyer. Where there’s sky, there’s also rock bottom! Set in the same universe as [Killer Pietro], this is the story of our ordinary, small-time citizen-killer Byun Hogil, who never even got close to the legendary Pietro.

A mysterious syndrome turns schoolgirls into homicidal monsters behind numerous atrocities in Japan. However, nothing is what it seems and when Chika Amagi is arrested for the brutal murder of five people, which starts a journey into uncharted and troubled waters!

Ririsa Suzunomiya, who is forced to live a cramped life at a girl's school where genuine ladies gather, is drawn to the sounds coming from the old school building...? The gorgeous and ladylike girls shout with beautiful sparks!

“The Hero defeated the Demon King in the war of men against demons…” Those kinds of stories are a thing of the past. Nowadays, adventurers, demons, Heroes, Demon Kings, and so on are all occupations that no longer involve putting one’s life on the line. Peace has returned to the world, and dungeon exploration has now become a form of entertainment. Adventurers and monsters now all fight using clones they’ve created with magic in an extremely popular form of dungeon clearing where nobody dies. The footage of the dungeon getting cleared gets broadcasted all across the continent, and I’m a member of a Hero’s party that was ranked the 4th most popular in the world… but not anymore. Parties had a limitation of 5 members, and I was told that an unpopular job like Black Sorcerer would only get in the way of getting to 3rd place or beyond.

Now that I became unemployed, I was forced to find another party but I just couldn’t find one. One day, I encountered a beautiful blonde red-eyed woman who told me she had a job for me. After being so touched from having someone recognize my abilities far more than my past comrades, I ended up agreeing to take an interview without asking for the details. When I arrived at my destination, I was at the world’s hardest dungeon where no party has ever reached the final area, the Demon King Castle, where the Big Four and the Demon King were waiting for me. This is the story of a Black Sorcerer that was kicked out of a Hero’s party and joined the side of the Demon King Army to repel the Heroes. (Source: Novelupdates)

Or
Please read the title again.

Artist's Twitter (NSFW): https://twitter.com/kana_kkn
Orignal webnovel: https://ncode.syosetu.com/n4836fm/

"I can't do this!"

Yoke Feldio, A Red Mage, has left his A-rank party of five years to become an adventurer, and has finally run out of patience with his life as an adventurer. being ridiculed as a "Handyman" and "poor dexterity"!

And so begins a desperate life of joblessness....

HOWEVER! Soon after Yoke is welcomed into a party of former students, all of whom are girls! And as he conquers dungeons, Yoke's abilities are revealed one after another.

In fact, the magic and skills that he wields have a power that is beyond the norm--?

At the beginning of the martial dao, abnormal beasts invaded the world. Humanity’s martials had to retreat in defeat time and time again. Lu Sheng transmigrates to that time, but in his dreams he enters a world 10 000 years later. The foundational body refining method from 10k years in the future is several thousand times more effective than the current one. Then there’s the breathing method, body refining pill formula, and sacred martial law from 10k years later… Despite developing martial arts for 10k years, humanity was annihilated! Their martial arts civilization reached the apex, and yet there was no one left to inherit it. Except Lu Sheng, he’s exactly that last spark of hope!

“Yup! Just as slow as I thought.”

After retiring from public fighting and getting fired from underground fighting, 27 year old Tenma Nozomi's zest for life is gradually dwindling away. It's hard to be at the bottom with nowhere to go, and that's exactly where she and her two friends are. However, Nozomi hits upon an idea that may just solve all of their problems: they could make their own underground fighting circuit for women, and tap into an underexplored market. As good as that sounds, her insistence on including the unknown quantity Hongou Hina may prove to be more than she bargained for...

"You must become the greater evil to fight against the real evil!"

Cassian dies after being framed for the murder of a comrade. Just when he thought it was all over for him, his soul is transferred into a young boy...

A popular, top-class Psyker who was everyone's envy turns into a Villain overnight!

The strongest doesn’t need any cheats!

Haruka, who spends his high school life a loner, was suddenly summoned to another world one day along with all his classmates.

When ol’ God enters the picture, Haruka believes he can just choose whatever cheat skill he wants to help him survive in the new world...
But, contrary to his expectations, that list of cheat skills works on a first come, first serve basis. And so, his classmates pick out all the cheat skills.

His choices now limited to leftovers, Haruka finds himself incapable of assembling a party due to his own “loner” skill.
Even though it’s a different world, it seems his adventuring days will be, as per usual, a solitary affair…

After becoming aware of a crisis looming over his classmates, Haruka makes a silent vow to save them. No relying on cheats!
He will walk a heretical path of strength that transcends the need for them.

The curtain rises on the strongest loner’s otherworld strategy guide!

The master spy codenamed has spent his days on undercover missions, all for the dream of a better world. But one day, he receives a particularly difficult new order from command. For his mission, he must form a temporary family and start a new life?! A Spy/Action/Comedy about a one-of-a-kind family!

Won the Tsugi ni Kuru Manga Award 2019 in the web manga category.

Noble young ladies were often said to be either rude and ill-mannered, or hopeless airheads with nothing but flowers in their heads.

Even in an age filled with such rumors, there was someone who taught them.

A commoner named Derrick, who awakened to his talent for magic and rose to prominence as a mercenary, is one day invited to serve as a magic tutor for noble young ladies.

As Derrick proves himself a star instructor— turning spoiled aristocrats into proper “people”— prestigious noble families begin lining up with offers of their own.

“There are no bad noble ladies.”

At least, not in front of Derrick.

Saitou is an ordinary handyman that gets transported to another world where his skills are very useful. He starts to really understand what it means to be needed.

"Yukio... I'm going to make a friend." A shy boy named Tetsuo. The only thing he had was a giant robot named Yukio. They became "saviors" in the fight against the galactic monsters coming from outer space. After the final battle, Tetsuo returns to Earth for the first time in ten years and witnesses an astonishing world. It's a frozen Earth (named Snowball Earth), where the entire land is covered in snow and ice, being turned into a deadly world! What happened to the human race? And will Tetsuo be able to fulfill the promise he made to Yukio?

A comedy manga about a company run by an adorable cat boss and the abuse she puts her employees through.

Sakimori Kagami plays a VRMMORPG called Arch Earth Online. He is a veteran player with the name and appearance similar to an elderly bearded wizard from a certain book about a ring. One day he purchases an appearance change item as a last resort to spend expiring currency and gets the idea of choosing what he would want to look like if his character was ever a girl. Falling asleep should have suspended the game, but Kagami wakes up still online and feels the game has has gotten a bit more realistic. Did Arch Earth Online finally get a long-awaited update?

Norito Yonezawa is a low-energy high schooler with little interest in reality. He can't stop thinking about his classmate, Hochiya. She's the complete opposite of him, eating whenever and wherever she wants with no regard to those around her. Despite this, somehow, he just can't look away...

The high school freshman Kishino Mamoru was expecting a fateful encounter and he met the pretty girl classmate Oshii Koko, and happened to know her secret. To his surprise, he found out Oshii-san's bladder is super weak...!! To not 'leak' this secret, Kishino Mamoru swore to protect Oshii-san('s bladder).