From MangaHelpers:

This 4-koma comedy manga follows the daily life of the intelligent, responsible 6th grade elementary school student Haruna Raika. She keeps busy as the elementary student council president and the classroom leader, and she even fills in for the teacher sometimes! [tethysdust]

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4-Koma comedy following the super genius grade school student Haruna Raika and her every day life. Where she's the class president, the room leader, the top student, and even fills in for the teacher when they've overslept!

The story starts with Sanda, a second year middle school student, getting attacked with a kitchen knife by his classmate Fuyumura.
While Sanda couldn't make sense of the situation at first, he gradually came to believe that Fuyumura's actions were just mean acts
stemming off from the latter having a peculiar puberty phase.

But that is all a misunderstanding. Fuyumura actually suspects that Sanda is the descendant of a certain lineage…

In the world of daily full-throttle dedication to his studies, there's Itsuki, a high school boy. The reason he's putting in so much effort into his studies is to reunite with his first love, a girl named Amane, and go on a date with her. While he's immersed in these study-centric days, by a twist of fate, he ends up living together with Amane and her sisters, Shion and Mone...!?

From PRISMS:
Wahhaman is a special robot soldier built ten thousand years ago by the Atlanteans. Found and dug up in present-day Toukyou, he doesn't remember anything, due to a nasty knock to the head he received at some point.

The world is not perfect. Learning to deal with its flaws is just a normal part of life. But there comes a point where these imperfections spawn a crushing realization... that something needs to change...

It's been ten years since the assassination of the Dragon King, the land's most powerful ruler. Off in the corner of the kingdom where tailed dragonfolk dwell, Jio, a human girl, yearns for adventure and an escape from rural life. However, when she meets the mysterious, amnesiac young man Neraid, Jio's life turns upside-down! With courage and curiosity knocking on the door, the two of them find the ultimate adventure waiting for them!! A traditional battle fantasy from a rookie artist begins!!

The virtual reality game “History of the Archana Continent” became part of reality, and “players” who were synchronized with humans appeared to protect the world. Lee Hoyeol, who was an ordinary salaryman, took over the body of the character he created in middle school, “Grandfell Claudi Arpeus Romeo.” Under normal circumstances, it would have been an absolute failure of a career, but Grandfell, whose occupation is a “demon hunter,” becomes extremely proud in front of demons! The only demon hunter in this world, Grandfell (= Lee Hoyeol) starts to make a move!

There are three female masters who are known to be the strongest in the world. The only thing they can’t get their hands on… their ideal man.

“If there are no ideal men, why not raise one yourself!?”

As they skim over the list of candidates, the ladies' eyes all fixate on one boy. A level 0 with no shred of talent…

After being betrayed and killed by the organization he worked at, the infamous assassin ‘Bi-Gwang’ reincarnates as ‘Kim Gyeongsoo’, a police officer. He vows to take revenge on ‘Hwaguksa’, the organization of killers that has betrayed him.

My school life has changed drastically just because she likes me that I barely talk with?!

Yuizaki Shino, one of the most beautiful girls in the school is a classmate of Fujiwara Sandai sitting behind him. It was only on a whim that Sandai helped her out despite spent his days studying and not having a single friend. It was supposed to be―

"I couldn't wait for after school! ....Hey, hold on a minute?"

That day and moment led Sandai to start dating Shino. They spend time together after school, they keep up with each other's hobbies, and they stay over frequently.... She's kind-sweet and always clings to him. And somehow, the other classmates started to pay attention to Sandai, they slowly changing his style appearance, and there was a lot of talks around his belt. He's more unsettled than when Sandai alone before. ....Well, this kind of school life isn't so bad, is it?

Note: Earlier release chapter will be on Monthly Comic Dengeki Daioh before Comic Walker release

Youki was reincarnated in another world. However, instead of being reincarnated as the hero or the demon lord, he was instead reincarnated half-assedly as a minion of the Demon Lord. One day, the Hero's Party attacked the Demon Lord's castle with the intent of defeating the Demon Lord. Of course, Youki was able to repel their attempt with ease. In spite of this, he ended up falling for the cleric, Cecilia, at first sight… The super popular love comedy fantasy set in another world! (Source: Gaugau)

Haise is a young boy who has been gifted with an unknown ability. He becomes an adventurer together with his childhood friend Sasha, but is kicked out of the team for being unable to use his ability and being a hindrance. Furthermore, while continuing his solo adventure, he is caught in a trap and falls into dire straits. Just as he is on the brink of death, Haise's ability "Weapon Master" awakens! It is a power that shakes the laws of the world, summoning weapons from another world! ? An unrivaled fantasy set in another world that begins with adversity!

The Earth’s existence is under threat once more as Itarim, the gods of other universes, seek to fill the void left by the Absolute Being. Sung Jinwoo has no choice but to send Beru, the shadow ant king, to awaken his son’s powers and start him on the journey he once took. Suho must conquer the shadow dungeon and earn his place in the world of hunters as he navigates through a new world against a new evil looking to swallow the world whole.

Masato is a first-year high school boy who is still struggling trying to fit in with his class. He is curious about Rinko, another loner who sits next to him. One day, he accidentally witnesses her secret wishlist, and ends up offering to help Rinko live out the spirited school life of her dreams…

(Source: Comic Fuz, translated)

He got a cute girlfriend who was the first in his life, but her friend tempted him with a body that was lewder than her ... What would you do if your girlfriend's friend pressed you like this? A fascinating erotic story drawn by Jura from the popular doujin circle "JACK-POT".

The King's Avatar Manhua Adaptation Rerun.

Widely regarded as a trailblazer and top-tier professional player in the online multiplayer game Glory, Ye Xiu is dubbed the "Battle God" for his skills and contributions to the game over the years. However, when forced to retire from the team and to leave his gaming career behind, he finds work at a nearby internet café. There, when Glory launches its tenth server, he throws himself in to the game once more using a new character named "Lord Grim."

Ye Xiu's early achievements on the new server immediately catch the attention of many players, as well as the big guilds, leaving them to wonder about the identity of this exceptional player. However, while he possesses ten years of experience and in-depth knowledge, starting afresh with neither sponsors nor a team in a game that has changed over the years presents numerous challenges. Along with talented new comrades, Ye Xiu once again dedicates himself to traversing the path to Glory's summit!

A sweet cross-cultural romantic comedy tale about a lesson exchanger from a beautiful foreign country, and the young man who takes care of her dinner.
Katagiri Naomi, a high school student who lived alone for two years, finds a beautiful girl with black hair, and blue eyes, who moves into the apartment next door. The girl's name is Yui. It seemed that she really was a noblewoman, and her nickname was “Quderella” because of her nonchalant attitude at school. Naomi knows that Yui doesn't want to depend on others, but she's actually quite naive, so Naomi decides to help her.
"Today what are we having at night... Karaage chicken, huh?"
"That's right because the price of chicken is discounted today"
“I love your fried chicken so I'm really looking forward to it”

This is the beginning of a sweet and tantalizing relationship between the girl and boy who lives next door.

In middle school, Konoha Satou dreamed of escaping into a world like that of Dark History, a romantic fantasy novel she wrote telling the story of the count's daughter Konoha Magnolia and the knight she falls in love with. Years later, her mother rediscovers that novel - only for Konoha to get hit in a traffic accident and die!

When she opens her eyes, she finds herself in the world of her own creation as the heroine's younger sister, Iana Magnolia. Somehow, she's been reborn as the character she created to be the greatest villainess of all time?!

Ghost-seeing School Boys oneshot included in volume 1 as chapter 3.5

The main character that loves the MMORPG Dunex more than anyone, in exchange for clearing the event he was transported inside the game world. However, he was transported as a fat mob villain.

Shunpei lives in a rural town of barely 3,000 people. Every day, he rides the same bus as his classmate An Takayagawa, the only one who went off to a private middle school. The two haven’t really talked since elementary school... until one day, something gives them a reason to.

A soft, sky-blue not-quite-love comedy, born on a bus for two.