From MangaHelpers:

High-school girl Yui found a mysterious boy lying unconscious on the beach. This mysterious boy can't remember where he is from, only that his name is "Sid." After a confrontation with the locals, they discover that Sid is one of the human weaponry developed by the Japanese government, known as "Uncanny Brains" or UB. As the powers of the UB unfold before them, will Sid's arrival on this island spell doom for Yui and her friends?

A chance meeting blossomed to love between two girls.
But it’s quite a peculiar couple: Sayuri is ordinary in every way, while her love interest, Yoriko, is a refined lady who seems to be completely lacking in common sense. Graceful attraction between two very different personalities, a sweet and slightly dazzling love story.

The story centers on Asuna, a girl who spends her solitary days listening to the mysterious music emanating from the crystal radio she received from her father as a memento. However, she embarks on a journey of adventure to meet a boy again, and thus comes to know the cruelty and beauty of the world, as well as loss.

Original Author's Comment:
"The death of a 19 year old high school girl. This is the story of the guy that hung out with her."

In the last year of high school, Ju Younghwa (19) is met with the suicide of his friend, Juwon. Right after her funeral, he gets into an accident that results in his memories being lost. Now, he slowly tries to learn about the past that lead to the death of Juwon.

Mundane problems happen every now and then. While not life-changing, they certainly can get someone in a pretty pickle! Luckily Nanige-san shows up around those close to her and helps out.

"Chronicles of Street Observation Research" is a "Papa no iukoto wo kikinasai!" spin-off centered on Yuuta's university life and what happens at the Street Observation Research Society.

In a world ruled by anthropomorphic animals. Humans live as slaves, and a group of terrorists dubbed the "World Destruction Committee" intends to destroy the world in rebellion.

A young man, Kyrie, who possesses the power to destroy the world, though he does not know why. Morte, a young woman with a tragic past and is the leader of a terrorist organization plotting to destroy the world. A demi-human named Naja, Morte's childhood friend Agan, a tough bear named Toppy, and a dragon girl named Lia. These beings will come together and journey to destroy the world!

Kagura - 16 years old, is a high school student that has been drawing many attentions as she also a famous face from the magazine cover. From professors to male students in school, they all fall for her beautiful figure and fierce personalities. Will this also mean that she might run into trouble or have a settled life in school?

A manga adaptation of the February 2015 Shunji Iwai's anime Hana to Alice - Satsujin Jiken, which is itself a prequel to the 2004 coming-of-age live-action film Hana & Alice.

Based on a video game of the same name where the hero strips the clothing off the female vampires and exposes them to the sun in order to defeat them.

A collection of unique, fantastical short stories featuring quirky, mysterious characters.

Kotori-chan and Hi-chan promised to marry each other when they grow up. But 10 years forward, the only one who’s actually “grown” is Kotori-chan, while Hi-chan still looks like a grade schooler. Hilarity ensues.

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?

From: Easy Going Scans

Mercenary Maruhan, the man who roams the darkness in the time of humanity's doom.

In the ancient era of the super-continent, where no border exists between the East and the West -- the race of Demonic Beasts begins an invasion against the human race, breaking the mutual non-aggression pact!

And as humanity takes to the road to seek refuge, some gather to form the ultimate army for an attempt to kill King Rhode, the Chief of the Demonic Beasts.

The intense story of one certain mercenary starts there.

Tamami-san is a bakeneko, an immortal cat-human, seeking revenge on all the descendants, to the seventh generation, of the man who scarred her for life. But to hunt down those descendants, she needs money. For money, she needs a job. Days in the office, nights out hunting. No wonder she can't stay awake!

A psychedelic romp featuring an ordinary high school girl and her encounters with the very odd guys who somehow always seem to gravitate towards her.

"An anthology of an adult puffing at blue smoke quietly" Various well-known mangaka look into the theme of cigarettes and smoking.

A seinen manga from 1979 (R-18)

Masaki Masamichi has his heart set on joining the legendary manga club of Takidani High School. After all of his effort to get into Takidani High School and prepare for his club entrance, he finds out that a horrible change has happened to the club of which he dreamed. How will he cope with the disappointment of learning that his long-awaited club life consists of drawing ero-manga?

Description Based on the Dragon's Dogma video game, this manga series is about the adventures of the Arisen Karol and his main pawn Elise. Karol's simple life as a fisherman changed when his home village of Cassardis was attacked by a dragon, who then proceeds to consume his heart, marking him as the Arisen. Now he seeks to reclaim his heart and along the way, he learns more of what truly makes an Arisen and of the mysterious Pawn Legion.