He was born from an egg.
His Name Is Kevin.
Half fish, half man.
A Mermaid.
Using imaginary creatures like sirens as a model, he was created.

From Aerandria Scans:

Mysterious alchemist Lorenzo Lusignano, descendant of the royal family of Cyprus, is searching for the ultimate secret of alchemy – the Philosopher’s stone "Elixir." Rumors of this blood-red gem creep everywhere, but nobody seems to have seen it, so Lorenzo’s travels through Europe’s Renaissance are never easy.

Each volume has a different title:
1. Guranashisu no Meikyuu (柘榴の迷宮; Granacis Labyrinth)
2. Bara yori mo Akaku Yuki yori mo Shiroku (薔薇よりも赤く雪よりも白く; Redder than Roses, Whiter than Snow)　
3. Gothic Anatomia　(ゴシックアナトミア)
4. Ofiukusu no Keifu (オフィウクスの系譜; Lineage of Ophiuchus)
5. Sen no Yoru no Ryojin　(千の夜の旅人; Traveler of a Thousand Nights)
6. Rakuen no Kizu　(楽園の疵; The Scars of Eden)
7. Chinmoku no Shima　(沈黙の島; Island of Silence)
8. Suijou no Meiro　(水上の迷路; Aquatic Maze)
9. Death Stalker (デス・ストーカー)
10. Seichi 1187　(聖地1187; Holy Land 1187)
11. Kurowashi no Keifu　(黒鷲の系譜; Lineage of Kurowashi)
12. Kenja no Ishi: Elixer (賢者の石 －エリキサ－; Philosopher's Stone: Elixer)
13. Hatami Yo (二十三夜; 23 Nights)

Volume 1
From Blissful Sin:

Ever since his mother passed away, Hinata has been taken care of by Midori, who is as strict as he is caring. Midori’s smart, and tall, and handsome. He also doesn’t have a shadow or a reflection in the mirror. Wait… What? Hinata’s a scaredy-cat, and thinks Midori might be a ghost. But he is in fact a…?

Volume 2
From Exiled Rebels Scans:

Midori has taken care of Hinata ever since his mother passed away. Midori has finally "exchanged” with Hinata, but will these two newly weds finally have the time alone to enjoy their honeymoon? Or is there something Midori is hiding from Hinata still…?

Oreki Houtarou is an "energy-saver" kind of guy, who expends as little energy as possible to do only things he has to. When he starts high school, his older sister sends him a letter asking him to join the Classics Club. The club meant a lot to her, and its number of members has been reduced to zero.
Houtarou reluctantly signs up for the club, only to find that someone else has joined, too! She's Chitanda Eru, a cute, big-eyed girl with an overwhelming sense of curiosity. A mystery crops up that catches Eru's interest, and also draws in Houtarou's friend, Fukube Satoshi. They continue solving mundane mysteries together, and soon they draw in Satoshi and Houtarou's friend, Ibara Mayaka, as well. Mayaka has had a blatant crush on Satoshi since middle school, but he always fends off her advances. Together, they search for the truth in a mystery that involves the history of the Classics Club.

The unbeatable high school badminton player Hashiba Leo started this game all because he wanted to become popular with girls. However, the truth is harsh and all the girls he liked rejected him for guys in other sports clubs. After his 15th confession failed, he was about to give up on badminton. An adorable girl showed up all of a sudden. Her admiration for Hashiba made his badminton spirit come alive again.

A collection of oneshots: - Yuki Iro Machiboke by Mikage Tsubaki One fateful night, the doctor Hanabusa saves a dirty street urchin and patches him up, and now this filthy child is determined to thank him. - Kosha Ura no Natsu by Sakurabi Hashigo Heartbroken Manabu-kun keeps meeting up with his senpai in the back of the school, who appears to be keeping a secret.

This manga follows the flame swordsman Vargas in his younger days before he became one of the Six Heroes. He aspires to become the strongest swordsman in Grand Gaia and become a legend. See a different side of the heroes of old through this exciting adventure! Based on the mobile RPG game Brave Frontier. Original serialized in Dengeki Bazooka.

For the sake of this world at least, would you accept my feelings?Big Banko, the 44 pages one shot about the most energetic highschool girl of the universe!

The story begins when a suspicious cult called the "Confusion Cult" enter the town. The god they worship is in fact a baby. The red-haired protagonist of the manga named Ann attends the school that the cult founded, and even though she is not popular, she is still loved by her friends. As she continues to rebel against the cult, the door to a mysterious world opens.

What would you do if money could be exchanged for life? Sell ten years of life for a fortune, or give up everything to buy one more year. At the age of 17, a high school boy who has it all together meets a man with superpowers that are both godly and demonic. Through a deadly struggle for his life, he stumbles upon a world "on the other side"!

Yugami Makoto likes to travel to different Hot Springs. On his 100th visit to a Hot Spring he meets a beautiful foreign girl in the bath. Stunned by her beauty, he immediately falls for her. But there is more to the girl than meets the eye. And why is Makoto forced to work at the Inn afterwards?

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?

Continuing in the Touhou series, this one follows the footsteps of Silent Sinner in Blue, Inaba of the Moon & Inaba of the Earth, and the Sangetsusei trilogy.

This time, Marisa comes across a mysterious hermit outside the Human Village. However, as she tells Reimu about her, the hermit is seen sneaking around the Hakurei Shrine. She's Ibara Kasen, a strange, bandaged ascetic of unknown nature and ability who's far more aware of them and Gensoukyou than either realizes.

When Tokyo ESP meets Ga-rei...

From Senpai Scans:
Takamachi Moka has been away from school due to a lung illness for so long, she has to repeat a grade. Stuck in the first year while her friends move on in the second year she eats lunch alone until a boy with a cat falls down next to her?

Oneshot by the author of Murcielago about a high-school arms dealer and a sale that goes horribly wrong. Comedy, absurdity and violence ensue.

Since long ago, a bitter rivalry and feud has long existed between two clans, the Toujo and Toyoda families. Because of this feud, it has long been Kanade's job as a shinobi to ensure the safety of Keigo, a member of the Toujo family, ever since childhood. Her devotion to her duty as a guard is a source of contention for Keigo, who would rather have her as a childhood friend than as a protector.

Of course, this protection extends all the way to school, so when Kanade comes across the Eishi Toyoda in class, the heir to the Toyoda family, she is initially hostile. After an attack, Kanade soon discovers Eishi is not exactly who she expected, and that threats to Keigo's safety do not just exist from the Toyoda family but within the Toujo family itself.

Chiyuki's dream is for making food and make Futoshi Mori, her favourite actor, eat it. And that dream almost came true. But when she found out that Futoshi is rarely eats at home, she was disappointed. Yet, she met Tsubasa, the second son from Futoshi's family.

From manhwa101
A young very talented hairstylist Hyunkang Kim, with an obsession for scissors, is one day recruited by an old man on the street. He later discovers that the gentleman in question was once the director of best hair salon in Seoul!

Accepting the offer thus begins his story. Challenges, friendship, overcoming past traumas, and delirious situations now fill his life! And there might even be time for some romance... ?