From Daum.net: Han Ga-Ram will even outwit the swindler gangs. Everything is solved when she transforms back into her unpopular highschool girl moments... Who would suspect a geek with glasses? There is only MONEY on her mind.. day and night. On the other hand, her other twin Yu Ga-Ram exists unknown to both of them. Unlike her, her sister has to bear the bullying acts of her step sister. The story unfolds when the twins try to escape their fate...

The Main character gets trapped in a world where it's ruled by laws and orders. Will he escape?!

Every 666 years in the Demon World, a fight to decide the next King the "Demon King Festival" is held. It is a battle royal fought with demons paired with human sorcerers. The demon Aini, carrying the desire to be King in her heart, quickly responds to her summoning in the human world, but what awaited her was.

From: Easy Going Scans
The grave of Zhang Chunan's long-dead grandfather was desecrated by a group of mysterious people, but his grandfather's corpse wasn't the only thing they dug up. Secrets and mysteries surrounding the Zhang family began to surface, and Zhang Chunan is apparently more than just an ordinary college student desperate to be rid of his virginity.

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One day, Zhang Chulan is attacked by zombies in a graveyard. In the midst of that situation, he saves the life of a girl, throwing the kitchen knife in his hand in order to kill the enemies. The girl tells Chulan, who is relieved, to face his hardships head on and leaves. However, Chulan later sees that girl again at his university. From that moment, Zhang Chulan's destiny begins to move. There will be strangers with special powers appearing one by one, with battles involving those abilities. Each episode will bring a new mystery to light.
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First published under the title 异人 (Yi Ren, literally: "Weirdo") and with subtitle King of the Weirdo in February 2015. A collaboration Chinese/Japanese anime television series adaptation titled Hitori no Shita the outcast (一人之下 the outcast?) airied in 2016.

From LuffyNoTomo:

Satou Mitsuru is an otaku who designs female game characters. His latest female design just so happens to look like the live-in male house keeper named Ninomae Nagisa.

Ninomae Nagisa is a young good looking guy. However, his cheeky appearance gives others the wrong impression. Even though his style is a bit flashy he's a sweet guy and the first person to realize this and not judge him based on his looks was Mitsuru. Therefore, Nagisa decides to make Mitsuru his lover--no matter what it takes. Even if that means turning from an angel into a beast!

Mitsuru keeps rejecting Nagisa, but how can he resist someone who looks so much like his beloved angel like character he designed!

An oriental fantasy manhwa that spans between Earth and the Underworld, using re-interpreted Korean myths and legends!

From: Easy Going Scans

The story begins to unfold in 900-960 AD, later Zhou dynasty, when Chi Wu is being imprisoned after purposely losing to the emperor. His true goal lies within the prison itself, a clue to the whereabouts of world's greatest lost treasure-- Qi Lin Treasure. The words of his capture quickly spread to the ear of his senior and a former officer of the imperial court. Tie Zong Heng (Lawless), decides to be re-enlisted to the imperial services just to hunt down Chi Wu.

Four little tales of fox spirits and human. Be it China, Japan or Korea, fox spirits always have a unique standing: each country has a tale or two about these infamous fox spirits. They can be both good and bad, revered and scorned, but they're always known for their intelligence and beauty. Enthralling creatures! ... Please read from left to right. ... Original webcomic. Original link: http://www.u17.com/comic/25618.html

From Easy Going Scans:
A story from Kousei and Tsubaki's childhood.

Note: This work is a special volume released with the DVD of Shigatsu wa Kimi no Uso.

From Whitelies Fansub & Dulce Tentación Fansub:
A twisted triangle, a new story begins...

Don't let your human scent linger. The intense story of Phantom Highschool, starring Ingan Kim who was just placed as the homeroom teacher of room 8!

A oneshot of the manga " Ito Junji Kyoufu Hakubutsukan 10: Shibito no Koiwazurai "

A collection of sweet, realistic tales about the everyday lives of various cats and the people who come to associate them.

From OSTNT: The continent of RAIEO was once ravaged by the Demon Lord and the Demon Race, in the darkest of times a Brave Knight carrying with him a Sacred Sword, saved the continent. After 300 years of peace, with the Sacred Sword now gone and the Sacred Sword Temple being occupied by the Demon Race, the continent of RAIEO is once again at a treat of war. Thus, our protagonist together with his donkey and a mysterious girl embark on a journey to stop the Demon Lord and the Demon Race.

Set 13 years after the original series, the story focuses on Miki and Yuu's little siblings.

Shadow hand that spreads depravity around the world, we call them archvillains! World crisis, religious conflict, territorial dispute, information control, ero-manga regulations... They are at the root of every major social problem(probably)! This is a story about a dreadful institution, "School of Supreme Evil" that raises archvillains and a police investigator who infiltrated it.

The world has become a desolate, lawless land where bandits roam free, innocent people suffer, and demons lurk around every corner. Souna Yuuki is traveling with his family when they are attacked by bandits. His entire family is murdered, and he is left with a snake mark on his hand. As he is about to die, a woman comes up to him and gives him an option: continue to live in this harsh environment or die peacefully now. Yuuki chooses life and Garami, the woman, gives him a second chance at life in exchange for his servitude. Garami is a weapons merchant and a gun for hire that travels from town to town for clients. Yuuki sees how brutal and unforgiving this world can truly be.

Moriya Shigeru’s hobby is reading BL and cross-dressing. He's a twisted guy who loves to harass others. However, there’s one guy he’s been feeling bothered about, and that’s Sahara Masatoshi, an idiot who clings to his one-sided love for his childhood friend. Shigeru, who can’t help but feel excited about the prospect of teasing Masatoshi, gives Masatoshi a blowjob to harass him, but Masatoshi looks at him as if he despises him…? “I won’t get hurt over something like that… It’s not like I’m really in love with him or anything.” The bitter one-sided love of a tsundere with an unpleasant personality.

Spin off of Kare no Tokubetsu na Kare which involves Sahara and Moriya. The difference between “love” and “hate” is always a difficult question for teenagers...

1-3) Hana to Usagi
Our delivery service's regular customer, Aizawa-san in room 411, is always wearing a rabbit head… Why is he wearing something like that in the first place? Pervert? Everyday he sends or receives delivery but you can’t see his face, and he’s almost mute, there’s nothing scarier than this. But one day, still wearing the rabbit head, he grabbed tightly onto my arm, “T-thank you, I’ll see you again tomorrow…” Saying it in such an embarrassed way- My heart beats so fast.

Extra - Actually I thought of a good way

4) That Smile Once Again
Fujimura is a talented pianist who refuses to perform in the school's culture festival despite the student council president, Segawa, trying to convince him daily. Why won't Fujimura perform? And why does Segawa keep on pestering him?

5) Greatest Common Denominator
Tatchan and Shouhei are in a relationship. Shouhei wants to ramp it up to the next level, but Tatchan seems hesitant. Is this love just one-sided?

Mihama Academy - on the surface, a closed learning environment established to nurture students who find themselves at odds with the world around them; in actuality, an orchard-cum-prison built to preserve fruit that has fallen too far from its tree.

Whatever the circumstances behind its establishment, Mihama Academy is at present home to five female students, all with their own reasons for "enrollment." For better or worse, each girl has established a routine obliging of her current situation; life moves at an idle, yet accommodating pace within the walls of Mihama.

Yet with the arrival of the institute's first male student, the nearly preposterously opaque Kazami Yuuji, the students at Mihama begin to fall out of step with their predetermined rhythms. Will Yuuji prove to be the element the girls around him needed to take hold of their lives once more, or will the weight of their pasts prove too steep a wall to overcome?

Based on the visual novel of the same name by Front Wing. This spin-off focuses heavily on Yumiko Sakaki's story.