One day, a high school boy named Rumi comes across an abandoned, decommissioned tram car, a place that could make a neat 'secret base.' He also meets the wildly energetic Fujino, who challenges him to a duel over usage of the space. Their duel is actually a very creative, competitive game played out in the public areas of the town. While Rumi almost can't believe what's happening, he has to admit that their 'duel' is the most fun and excitement he's had in a long time, much more exciting than his video games. Before long, Rumi and Fujino are friends, and their adventures with the abandoned tram car, soon named the "Black Parade," have begun!

Heisuke just came into town and the first thing on his to do list is chasing pretty girls, which causes him to get punched in the process. After reaching the house he'll be staying at he sees a girl trying to sneek inside. Seeing this as a perfect opportunity to legitimately grope a girl, he attempts to stop this intruder only to find out that it's the same girl who punched him earlier, not only that but her name is Umi and she just happens to be one of the three sisters who live in that house along with their mother. The next day Umi finds out that Heisuke is a boxer who's skill is only eclipsed by his letcherousness.

From Lililicious:

In this Christmas-themed chapter of Cattleya Heights, a 4-panel strip by Ooi Mariko, the characters go skiing.

From Bliss: While trying to find a job, Manji, a for-hire bodyguard, also known as "Akainu (Red Dog)", meets Karu who works for "CARDS". Discovering that Karu's mission is to exterminate the deadly "TOYs", which mindlessly attack any living things, Manji can't help but forcefully tag along to relieve his boredom... Edit: Officially a Shoujo manga, though the artwork and action seems to differ.

Back in high-school days, Shin fell for Natsume (a glasses-wearing, short-haired girl) at the first dialogue with her. He even applied for a less competitive major of the same college just to be with her, but unfortunately she was not admitted. Shin helped Natsume to retake the exam and the two became a couple naturally. The story follows small romantic events in their and their close friends' daily lives.

From ShoujoMagic:

Karate girl Seri tries to kick away her past in order to catch a new guy at a singles party, but Tamaki, a childhood flame from her old karate dojo, shows up to show off and makes her heart pound. Their reintroduction leads to a karate challenge, and if Seri loses, she must become Tamaki's "toy"...!? It's a game of love with more rivals and obstacles (and sex!--LOTS of SEX!) than either Seri or Tamaki could have foreseen!

Includes extra stories:

(Vol.02) Virgin Beast - Dumped for being a virgin, Katsuragi Mio decides to ask Virgin Killer, Tsukahara Masaho for help.

(Vol.03) Scarred Innocence - Naive Moeka wants to fall in love but Kamiya Shun might not be the nice guy she thinks he is.

(Vol.04) A Girl's Mischief: Love's Supreme Principle - Renai Shijou Shugi sidestory.

(Vol.05) Rescued Letter, Complicated Love - Nozomi delivers a love letter to Shigeyama Itsuya from her friend but...

(Vol.07) Ribon

(Vol.08) Flower of Despair, Thorns of Pleasure - Renai Shijou Shugi Sidestory. Takarai Kou's point of view.

From: Easy Going Scans

Officer Park Yoon Hee is a beautiful young detective who has high hopes of being accepted in the Violent Crime Division. However, her father and chief of police, has other plans for her… so instead of the Violent Crime Division he assigns her on the Unsolved Crime Division were nothing ever gets done and there is only 2 staff members including her!
The excitement that she most eagerly longs for though, is about to barge in her life when she will meet a mysterious boy…

The curse of twelve stars, a girl who plays piano with a dream of becoming a chef, because of an odd job that she pretends to be a boy. What's waiting for Yue Hui is a mysterious mansion and 12 boys who have the curse of 12 stars which fall upon each of them. What's awaiting her? Where are her and the boys' destiny leading to? A love song for 1000 years, the legend of 12 beautiful stars, everything is in《Starry Night Club》

From Summer Rain:
Seo has been in high school for little more than two months. She likes schools that allow casual clothes. However, the annoying, stupid guy, Narusawa Shin is really hard to deal with. Could such men really be?!

The main character joins popular all-boys singer group 'moon'.

A girl runs away from home, pretending to have been kidnapped.

A lone mercenary traveling in a foreign land is forced to participate in a street brawl, fighting back-to-back with a gun-toting man wearing a pelt around his shoulders. When they emerge from the attack unscathed, the man orders him to become his bodyguard.

Only then does the mercenary-turned-bodyguard learn a surprising fact - this spirited fighter is the King; and between near-daily assassination attempts and His Majesty's obvious disdain for him, his life at the palace is not an easy one.

But eventually, the bodyguard begins to realize that there is a reason behind the King's arrogant demeanour - one which he becomes determined to find out. Still... how can he protect a man who doesn't want to be protected?

Sadao, a graduate of a low class college, finds himself surprised that he was moved to a different department in a high level office building, located on level B2 (basement level), of the building. Upon entering his new office, he encounters a miko, and is told by his superior to follow her. He follows her and finds a man about to rape a woman, but the miko, named Ichiko, enters the scene and purges the man. A spirit exits the man, and things are back to normal. According to Ichiko, the number of sexual harassment and rape cases have multiplied by 20 times over the past 3 years! In order to do so, Ichiko is to reduce the number of such cases and prevent chaos from occurring by purging these souls that affect the minds of humans. Sadao was believed to have potential to fight against these souls, which is why he was moved to that department. So what's the secret to her powers? Read and find out!

Sakura is an incredible kendo fighter who uses an abnormally short shinai. She regularly trounces boys who underestimate her skills. One day two kendo fighters, even stronger than her sensei, attack her dojo asking questions about someone called Narukami Koharu. Apparently, there is a lot Sakura doesn't know about her family history, and it could very well get her killed. Now, Sakura must try to live up to her father's legacy.

1) Happy Cook
Chef Nakasawa saves Tokiya from trouble and ends up teaching him how to cook. But is it only cooking that Nakasawa will be teaching?

2) Straight Mind
Incoming freshman Kasuga has always won any fight he has been in, until he meets the elusive Tougou. Kasuga wants nothing more than to meet Tougou again and fight, but he is told to stay from Tougou. It seems that Tougou is the chief director's son, and a previous student was expelled for hurting Tougou. Can Kasuga stay away? Will Tougou allow anyone to get close to him again?

3) Happy Place
Stray dog... stray uke... Does it really make a difference?

4) My One-Sided Love
Kazuki is a game programmer who collects adult toys. He's also been in love with his neighbor Masato for ten years. When Masato asks Kazuki to teach him how to use a computer, will the time they spend together be all work and no play?

5) Restriction
Tsukasa may look scary with his piercings and blond hair, but the straitlaced head of the disciplinary committee is the frightening one! He ruthlessly uses Tsukasa who's trapped! But sempai will graduate in a year, then Tsukasa will be free, right?

6) Special Lunch
We go back to our original couple from ch 1 and a new type of dinner date.

A short one-shot about a student council president who seeks to be an "onee-sama".

The story's about the blond-haired Haru and the dark-haired Ryotaro who are the best of friends. A girl suddenly steps into their life and caught their attention, and thus romance blossoms! The thing is that she is experienced in the field of love, but on the other hand, they have zero love experience?!

A story of a vampire who might disappear like smoke and a girl who loves money.

From Sweet Indulgent:

4-koma story about raising the Demon King's kid.

17-year-old Saitou Ken joins the student council filled with otaku... specifically BL fan-girls...