After his little sister got raped & killed herself, a teenage boy took revenge & killed her rapist in return.
7 years later the boy's released from prison, determined to kill himself due to insufferable guilt but then he's confronted by the rapist's daughter. A dramatic tale of guilt & atonement.

The main character is a detective, Kazuhiko Amamiya, suffering from Multiple Personality Disorder (a.k.a. Dissociative Identity Disorder). Starting out as a violent detective series with a twist (the twist being the variant personalities that take over Detective Amamiya at various intervals), the series evolves into an exceptionally complex and involved sci-fi conspiracy story.

In the near future where Android (A.I) becomes common among humans, a virus outbreak suddenly occurred, turning over 70% humanity into zombie-like "Creatures." The A.I soon break away from their infected owners since they're not programmed to recognize "Creatures" as humans, but one of them, the housekeeper Hasty, acted otherwise when her infected young master, Neville's final words struck something in her. Sticking with him after all other humans have been infected in the area they're living in, Hasty vows to do whatever it takes to cure master Neville, even if she has to fight against the whole world who's now looking to exterminate all Creatures to cut off the infection source completely.

Hunters are a special breed, dedicated to tracking down treasures, magical beasts, and even other men. But such pursuits require a license, and less than one in a hundred thousand can pass the grueling qualification exam. Those who do pass gain access to restricted areas, amazing stores of information, and the right to call themselves Hunters.

"Kouji-kun, I want to see you have sex with another girl."

Even though this will drive my mind and body further into a corner, I just can't hold back my feelings of wanting her to love me...

(Source: Ganma)

Short story collection including:

1. Iguana no Musume:
A girl develops a complex about herself after her mother thinks of her as a hideous iguana. Iguana Girl reflects Hagio's own relationship with her mother, and it took her "years to write this story".

More info about Iguana Girl at Wikipedia

Mary, a girl who moved from Tokyo to the countryside, meets the mysterious girl Colin in a "secret garden" up in the mountains. With nowhere to go, they share a "secret" in the garden that they can't tell anyone. They didn't realize the consequences of what they did.......

(Source: Yuri-Hime, translated)

The Post-Apocalpyse and starting a Newlywed Life with an Angel.

A cute girl came knocking at the protagonist's door, but for what reason may it be.

In a world where everyone struggles to live, Onmirae, the only boy who wants death.
One day, a death squad appeared in front of him and offered him a proposal. ‘I’ll kill you, let’s rebuild human society together’ To
die, you have to save everyone.

A fantasy about a knight who lost everything and his story of survival strategy and territory restoration!

One day, when the lord's son, Agredios, came back to the village after a long hunt, the sounds of villagers bustling and their laughter were all gone. After learning that the "witch" that lives in the "Forbidden Forest" was the cause of their demise, his despair turned to rage and he stormed into the forest for revenge alone.

Kouji and Izumi are still playing one step forward, two steps back in their angst-ridden dance of love. The drama is taken to new heights in this series: just how far will Kouji go in his desperate love for Izumi? Will these two ever be together and be happy at the same time?

Note - Volumes 1-14 have been completely translated into English. However, several years after the supposed finale, the mangaka published 3 more chapters (recently compiled into a 15th volume) which act as an epilogue for the series, though the 14th volume had a conclusion of sorts in itself. Of these, chapter 1: Ai ni Obore, Ai ni Shisu has been scanlated, but chapters 2 and 3, titled Rakuen 1 and 2, have not.

Inside the village of Poe a mysterious noble family takes residence with their son Edgar and ill daughter Marybell. Edgar is quickly intrigued by Allan, the heir of a transportation company, who catches his eye by almost running him over with a horse. As the story unfolds a few residents of Poe slowly begin to wonder about the new family...

Note: Along with They Were Eleven, Poe no Ichizoku was awarded 21st Shogakukan Manga Award for Shoujo in 1976.

The story is composed of 15 loosely connected short chapters. Time and place vary with each episode and events are not in chronological order. Click here to view all chapters in chronological order.

Ayano is a girl with her head in the clouds: she loves reading so much that she scarcely pays attention to the real world. Hoping to bring her back to reality, Ayano?s mother sends her to Noumi Takayuki, a one-time author who now works as a consulting detective. As Takayuki's assistant, will Ayano find a reason to love the world around her? And will she be able to help Takayuki fight his inner sorrows?

From MangaHelpers:

Katagiri Yuichi believes that friends are more important than money, but he also knows the hardships of not having enough funds. He works hard to save up in order to go on the high school trip, because he has promised his four best friends that they will all go together. However, after the class's money is all collected, it is stolen! Suspicion falls on two of Yuichi's friends, Sawaragi Shiho and Shibe Makoto.

Soon afterward, the five of them are kidnapped, and wake up in a strange room with a character from a short-lived anime. Apparently, one of them has entered them into a "friendship game" in order to take care of their massive debt. But who was it, and why did they have such a debt? Could they have stolen the money from class to pay for entry into the game? Katagiri and his best friends will have to succeed in psychological games that will test or destroy their faith in one another.

Japan has entered a new era called “Reiwa”, after moving past the Hesei Era on April 30th 2019. It is in this era, past the time of people like the legendary Akagi Shigeru and others like him who gambled on mahjong for a living, that a new gambler has arisen known only as “Yami-ma no Mamiya”, which in English might translate to “Mamiya of Mahjong's Darkness”.

Born as the illegitimate second son of Loxollum’s king, Iblonde is sacrificed by his pagan mother to ensure that one day, he sits on the noblest seat in the kingdom. A few years later, Iblonde has started a new life as Abel, a serf of a baron’s domain. Aside from his tragic past, Abel harbors many secrets, including the fact that he is actually a girl. But the greatest secret of all is that Abel’s resurrected body is now occupied by Belial, the seventh king of hell, who has come to slowly plague the land...

A collection of short stories. The first volume contains stories about...

- A lonely woman who works part-time, and who has crippling social anxiety that leads to misunderstandings.
- A girl who is 'dumped' by her close friend.
- A single mother who struggles to understand how to make her daughter happy.
- A girl who desperately wants to buy a dress that she thinks could change her life.

... and many more!

High school student Sachiko is bullied daily and is the recipient of constant unpleasant pranks in class. The culprit is unknown, however, in truth, to Sachiko those days were not particularly painful. That is because her beloved Aida-sensei is there to save her. Bright, handsome, and with a strong sense of justice, he is popular with everyone. Of course to Sachiko he is her special hero. However, Aida-sensei has a secret…

Until now, Aru can’t speak because of an incident. With the help of his little friend, Kiran, and his other friends, Aru is trying to continue his school life as usual, even though communication will be very different from before.