Hiiro, Reiichi

Ayase kai almost drowns in the ocean but is saved by a merman. He thought it is all a bizare dream, until the merman shows up again at his company, this time with legs. He claims to be a rich prince and Ayase's new boss but thats not all, his true goal is to make Ayase his mate!
(from B-U)

Wild Fish

ワイルドフィッシュ

YEOMRA

Suwon is an S-class Guide with a notorious temper and a strict "no-touching" rule. After beating up one too many Espers who tried to get handsy, he's given one last chance to save his career: a month-long live-in contract with the powerful Esper Gong Ian. There's just one problem. Ian is the same pervert Suwon caught grinding against him on the bus earlier that day! To make matters worse, Ian isn't just a creep, but a massive masochist who gets off on Suwon's violence. Suwon came to guide him, but he might end up beating him into bliss instead.

(Source: Lezhin Entertainment)

Guiding Me Mad

환장의 가이딩

Matoh, Sanami

Half-Japanese Randy "Ryo" Maclean is assigned as a new detective to the 27th precinct at the New York City Police Department. His boss pairs him with Dee Laytner, a good-looking veteran prone to impulsiveness. Much to Ryo's confusion, Dee takes an immediate interest in his new partner.

In their first case together, Ryo and Dee must take care of Bikky—a young boy whose father was killed due to his involvement in a shady drug trafficking business. Bikky denies having any knowledge about his father's actions prior to his murder. Even so, it is up to Ryo and Dee to protect the boy from those wanting to get rid of him and preserve any evidence he might be holding back.

As time goes on and the detective duo works increasingly more together, the distance between them gradually shortens. But could Ryo ever reciprocate Dee's feelings?

[Written by MAL Rewrite]

Fake

FAKE

Yamagishi, Hokuto

Long ago in a distant land, when the heavens ruled the earth, the two of them met by a trick of destiny...

Called the "Wise man of the woods" and given much respect by the villagers, messenger of heaven Olgrius is searching for the origin of the incessant outbreak of storms. Then a villager, speaking riddles of an attacking beast, appears.

The being that Olgrius sees when he returns to the scene of the crime is a savage beast fallen from heaven. But the beast differs from the rumors—he touches Olgrius gently, and protects him from danger...!? 

(Source: Nakama)

Wild Wind

Yamada, Yugi

Aida, Saki

Izumi is a dedicated single parent haunted by his past while trying hard to make a future for him and his son. First suffering the crippling loss of his closest friend after their junior high graduation in what was an ego destroying personal rejection of their friendship, he then went on to lose his young wife due to complications of childbirth. Thankfully, his seemingly tough yakuza brother in law, Sawaragi, was there to lend a hand when he needed it most. Things seem to be going swimmingly well until his childhood friend makes a sudden reappearance, throwing Izumi into emotional turmoil. Just what is Takatsudo playing at, wanting to hang out like close friends again after all this time? Izumi's determined to find out just what is going on before his heart is crushed beyond repair this time...

(Source: DMG)

Taka ga Koi Daro

It's Only Love

たかが恋だろ

Motoni, Modoru

A story about two men that have been best friends for years, knowing the fact that they have feelings for each other, and ignoring it. They discovered it on their college days and settled the matter with a time limit; if they hold the same desire years later they will do something about it. Now both of them have girlfriends, but it seems that their desires only grew stronger, in spite of loving their women. So, what happens when their girlfriends agree to make them indulge in their desires?, and have a relationship only between the limits that desire allows them...

This is a bet, to know what is stronger, love or desire?

(Source: Queen2408)

Koi ga Bokura wo Yurusu Hani

恋が僕らを許す範囲

Takaguchi, Satosumi

High school delinquent Mura must put up with the annoying presence of new stepbrother Subaru when his mother goes away on honeymoon. Dealing with gossip at school is bad enough, but Mura's life is turned upside down by a forbidden locker-room kiss and the publication of an incriminating photo snapped by shounen-ai fangirls.

Takaguchi Satosumi's first BL work.

Lucky-kun

Fortunate Boy

幸運男子(ラッキーくん)

Takagi, Ryo

A spin-off oneshot of Ousama Game, involving, yet another Prince (5th) ... and, of course, a Pirate... 
(Source: DokiDoki)

Kaizoku Game

Sasaki, Kumiko

Fantasy series of short stories that involves animals:

Pet Doctor Atsushi Kirishima meets a cat-guy with tail, cat-ear and injured eye when he is searching for his runaway patient animal. Atsushi can not leave the cat-guy and takes the guy to his animal hospital with him.

Hattori, an apprentice of Atsushi's father, Kenzou finds a dog in the mountains and brings it back in a car. On the way home the dog changes into a girl..

(from B-U)

Suzu no Ne ga Kikoeru

鈴の音がきこえる

A collection of one-shots with continuation from Dare ga Omae wo Suki dato Itta.

1. Shinuhodo Suki
2. Suki sugide Kirai (continuation of "Shinuhodo Suki")
3. 10 jyuu Nen Omedetou Manga

4. Akegarasu
A story of the awkward beginnings of an intimate relationship between the boss of a large business, Yoshimura, and a young and handsome male employee called Sakura. Through this brief oneshot, they discover each other's true personality and find out that they are no so different from one another. (Source: MangaUpdates)

5. Yume no Awayuki (continuation of "Akegarasu")
6. Aokute Gomen
7. Onna ni Shika Wakaranai
8. Ai ga Doushita

Shinuhodo Suki

I Love You All Over the World

死ぬほど好き

Kodaka, Kazuma

A look into some of Nobunga and Sagara's time together.

Mezase Hero! dj - A Man of Many Requests

A Man of Many Requests

Kamei, Yogorouta

At the end of the yearly winter, when the Tetsugome Zorainu (or "Celestial Dog") is to chose its bride, all the girls are hidden within their house, afraid that they might be chosen.Yuzu, a young boy living in a household of all girls, is made the black sheep of the family and sent out to do the chores. A chance encounter by the lake with Shuro, a fox spirit, bind Yuzu and Shuro together. (Source: MangaUpdates)

Includes three one-shots: Kotonoha, Neko Yanagi, Shirotakes Bookmark

12 Manga Like Magical★Travel Boy