From Lezhin: Yeon Jang Hwa is a more or less average college student: she attends a pretty good university, is not too ugly, and has a nice boyfriend. Her a twin sister, Hong Reon, on the other hand, is the opposite. Being the good sister she is, Jang Hwa sets out to help her twin sister... but at what price? The truth is in the details. Original Webcomic http://www.lezhin.com/ko/comic/twin 

1. Natsu no Hajimari (The Beginning of Summer)
Two friends spend their summer together.

2. Suika
On a summer day, what makes a girl go for a watermelon...?

3. Yuudachi Kibun (Evening Rain Feeling)
On a hot and humid day, two girls searching for a place to do more than kiss come face to face with their emotional issues.

4. Sketch

5. Natsu no Ari
Yuko and Mika have been going out for a year now, but Mika seems to be too absorbed in watching ants dig than to pay Yuko any attention.

6. Tainai Kaiki (Inner Revolution)
Two girls are in the school pool when it begins to rain. They end up in the curtains in the multipurpose room. Mayu had previously confessed to Akami, but had been rejected as a lover, although not as a friend. But for some reason, Akami is moved to kiss Mayu today as she sleeps.

7. Himitsu no Seseragi (The Secret Stream)
Two girls, Risa and Tomoko, goes to a secret stream to purify their tainted hearts.

8. Natsu to Ieba (Summer Is All About)
Two friends enjoying summer and then realizing they have feelings for each other on their last day together.

9. Birthday

As the title implies, the omnibus series' theme will be various stories on the undead instead of the quirky romantic comedies that have propelled his career in the past. However, the advertising promises that the series will have comedy in addition to "moving and heartrending" stories.

From Pink Litchi Scanlations:

“Go ahead. You can do anything you want to me.”

Akihito woke up to find himself naked and restrained. In front of him was a young man who insisted that he himself had agreed to be in that kind of situation. Full of objections, he was told “I’ll teach you how to bring out your real charm” by some man he’d met at a gay bar and with that, he thought about giving in…

For 500 years, people have been unable to enter “The Forbidden Continent” in the Southern Hemisphere. Mankind’s first successful voyage, the research ship “Pandora”, has returned. People from around the world gather to try and catch a glimpse; and Nayuta, the daughter of the Pandora’s captain, is also excited to see the creatures brought back from the Forbidden Continent. She happens to meet a mysterious young boy on Eden Island. Sen warns Nayuta “You don’t know the real reason the “Forbidden Continent” is forbidden”…what does Sen really mean!?

A rootless mercenary meets the Crown Prince of a certain country. This meeting just might be a ray of light in the darkness for the supernatural war that will soon begin to tear the land apart.

A story of four girls from Hakugin Gymnasium, a boarding school for orphans, and their loves and longings.

Volume 1
1. Kogoeru Yubisaki
2. Shirayuri ga Aka ni Somaru Hi
3. Haru no Yume (Frühlingstraum)

Volume 2
1. Watashi no Naka no Chiisana Tsubasa
2. Yuki no Furu Michi
3. Shiawase wo Yumemite

Kira believes that Rei and all other men in the world are dirty. She stays away from her classmates, hiding in her art. What happens when the delinquent motorcyclist and playboy, Rei, gets a hold of one of her drawings, and actually wants to keep it?

The first story, Namae no Nai Uma, is a ＭＡＲＳ prequel telling the first meeting between Rei and Tatsuya and the beginning of their friendship. Moreover, they've also presented other main characters such as Kira and Harumi.

The second and the third stories, Nemuru Raion and 1 Karatto no Kajitsu, are oneshots not related to ＭＡＲＳ.

The first tells of the strange relationship between Isomu, a guy who pretends to not have any fear, and Ayame, a girl with particular behaviours; on the contrary, the second tells of Nina, who has some family problems, and Rui, her classmate who is interested in a close friend of the hers. But what if he's interested in Nina?

Formerly esteemed as a prince, Yong Qi got accused of a crime and was used to stage his brother's way to the throne. But what they don?t know is that this brother of his actually has strong feelings for Yong Qi.

Will this story turn out to be yet another fight for the throne or will it be romantic just like a poem?

A humorous short about a shopkeeper, two kids, and a little magic.

The story takes place a year after the ending of Worst, when Sajima Yousuke and Miyamoto Sanmon are seniors at Suzuran High School.

As of May 2018, the last work in Takahashi Hiroshi's Crows x Worst universe by the original author himself. A two chapter gaiden story about a younger generation of Suzuran's crows, released in 2015.

From Aerandria Scans:
Mika is just a normal high school student who dreams of having a wonderful love. And then one day, she happens to meet Hiro, the guy of her destiny. While experiencing many sad events, and while getting hurt, the time she spends with him is still one of the most happy moments in her life...

Though he seems completely indifferent to romance, high-schooler Manabu works part-time as a writer for an erotic magazine. One day, right when some classmates were about to pick a fight with him, he was saved by Yamaguma, an underclassman. Apparently Yamaguma, who is popular but unfamiliar with romance, is upset about his older sister working at a nightclub. While trying to desensitize Yamaguma of his excessive reaction to Manabu's erotic writing, they...? The heat of their connected hands is the folly of youth. A bittersweet diary of first love.

After recently moving to Onomichi, Hiroshima, high school student Tasuku Kaname is thrown into despair at the possibility that he may have been outed for being gay. Convinced his life is over, his despair turns into shock when he sees a woman jump out of a window of a nearby house. Tasuku races to the house in a panic only to discover that it's a public meeting lounge owned by the woman he saw before. Tasuku comes face to face with the woman as she walks past him unharmed, but not before she implies that she had been watching him from afar. Confused, Tasuku follows her up to the top of a steep hill where she offers to briefly listen to what's on his mind. Although Tasuku doesn't go into too much detail, he later accepts her invitation to come to the lounge to meet others with similar troubles.

Teijin Sakuichi was born in a house of one of Japan's leading conglomerates while Ryota Kishi was born and raised in a common household and lived a rather crude lifestyle. Despite this difference, they were neighbors and childhood friends that grew up together. However in the winter of their third year in middle school, Sakuichi proposed to Ryouta before going to study abroad. Years later, having no contact, Sakuichi suddenly appears before Ryota .

A boy opens a chest at his father's temple, and out pops out a Hanyou, a half demon, half human girl who wishes for nothing more than to avenge the death of her mother and herself. It just so happens that the boy looks just like his ancestor, the one who killed the girl and her mother.

A short one-shot recounting the legend of a dragon and a sacrificial girl.

From Dangerous Pleasure:

Tomoya Kurata, having no living relatives, has just lost the elderly Kaname Tsukiyama to whom he was particularly close. One day, while grieving alone in the old-fashioned house where the memories of her remain, he encounters Hikaru Tatsui, who declares he is Kaname's grandson. "Would you mind living here with me?" he abruptly proposes, and Tomoya is forced into living in the same house. At first Tomoya is disgruntled, but is the feeling of being unable to turn his back on the somehow slightly lonely Hikaru gradually turning to love?