Everything happens for a reason, even the guy with the weird hair at the train station that apparently ruined your life.

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Orginal Webcomic

Akohito is a simple guy who wants to find a perfect girl, until he met Agate who was a marble turn into a human. He thought his life was turn into a Shōjo manga but he didnt know his life turn into a Shounen manga instead and he will discover that Agate is not just marble girl but is an aion soul weapon.

The mysterious woman, and those who are controlled by her. Don’t be fooled by the devilish hidden grin! The legendary hit author, Lee Jongkyu and the god artist Rigeng’s full length webtoon.

From Chibi Manga:One day, a high school student, Tsubaki, woke up to a good looking guy in a futon. He forcefully made me go to the 'Ousaka summer house' with him, where Monono monsters and a human child will encounter each other...!?

From Spoils:

A School Pop Comedy!

Masaki Aoi is a high school student with a sweet tooth. All her life she has been treated like a boy but change is on the horizon for this tomboy! Yuase Takumi is a third year middle school student. He's also the president of the Confectionery Club, and he's extended an exclusive invite to Aoi to join his club....too bad he thinks she's a HE! But pressure from her classmates forces Aoi to play along and she finds herself joining the Boys-Only Confectionery Club.

What will await her?

From Cosmique Scans:

Haruma Shinohara has always been looked at as someone who is frightening and cold. With his attitude no one would have figured out that a first year, Tetsubei, had crumpled that exterior by stumbling upon Haruma's weakness. A oneshot about an unexpected secret, and the development of a sweet relationship.

Tatakae! Ryouzanpaku Shijou Saikyou no Deshi, relates the story of a peaceful yet weak boy, who one day, after being beaten up really bad by some of his school comrades, decides that being bullied around isn't an option anymore. Seeking revenge on his bullies, the young boy, Shirahama Kenichi, decides to join a fighting dojo. But what he doesn't know is that the dojo he wants to join is actually a place of gathering for those who have mastered different types of fighting styles. Thus begins his journey...
This is the original version that History's Strongest Disciple Kenichi is based on.

Hazama Shunichi dreams of becoming a cameraman but was raised to inherit his father's fish shop.

One day, he fell in love with a girl before his lens..

Nishimura Shousuke is a local shoemaker with a leg and foot fetish who was once famed for making women's shoes. However, after having to make a difficult decision he has decided to never make a pair of women's shoes again.

Until one day, a high-school girl enters his shop with a particular set of shoes that were once created by Nishimura and were in need of repair..

What is Tanpo? Basically it means security collateral. In this story, the Suzumiya family have run deep in dept that they pawn off their three daughters Yukari, Ai, and Midori as guarantees for the money they'll receive. Well, they mistake some piece of trash called Ishihara Yuujirou for the Daikoudan Group. Unfortunately, Ai-chan is the one that the rest of the family/staff coerce into tempting Yuujirou with her body to initiate sex with her in order to secure money for the debts.

One day, Miwa's little brother came home late from playing by the Tama River with one of his friends and an adult man. He convinced Miwa to come meet the man, claiming he looked like Johnny Depp. Miwa and her friend Aya come to meet him after school and discover that was a total lie.

However, Miwa finds herself drawn to the goofy young man, whose name is Haruo. To Aya's annoyance, Miwa develops a major crush on him and talks about him constantly. But could anything come of this crush, since Miwa is a first year high school student and Haruo is an adult? Miwa starts to get to know Haruo, meeting him day after day, there by the Tama River.

Mirei-chan is the highschool freshman representative, but she's got a problem: she hasn't grown a centimeter since she was a six-year-old.

In the lawless Arang Technical High School, Kim-gu simply hopes to lead his life as a "good student"...

An aspiring manga-ka comes home, only to find her tools in a bitter war.

"Sensei! This is different from the school life I expected!"

From Ochibichan:

“I must get into that school!”

That was the sudden thought Chinatsu had during the summer of her third year in middle school. Chinatsu never really thought about her goals and dreams in life, but after seeing a match in the Japan National High School Baseball Tournament (or Koushien), she suddenly had a goal to achieve! She worked extra hard, and finally got into the school, but on the first day, she meets a fierce looking senpai who is actually the baseball team’s ace player! Once again, Chinatsu did her best and managed to be the baseball team’s manager, yet the most important player is…?!

Misunderstood in the dark, Na Na "saved" a girl from a "pervert." Now he has his eyes on her. He brought her many troubles continuously at school because he is a "hot boy" many likes. Now, Na Na is determined to get revenge, but maybe she met her match...

With her mother missing and an empty stomach, the Oni girl Senri reluctantly came down the mountain towards human habitation, where she collapsed in the street. Coming across her by chance, Shino offered her house as a place for Senri to live.

This tale is about Oni girl Senri, the energetic girl Shino, and the people around them as they all come to realize "Somehow I’m communicating".