Watanabe, Michiaki

Pandora's Box led a cursed existence. Through the curiosity of a woman, evil was unleashed and very nearly covered the world in darkness. Miraculously, humanity managed to seal Maou Kestra back into the box, but only with immense sacrifices. Even without their lord, the demons are still a formidable force that has only grown stronger with time, locked in the abandoned capital of the North, Hameln. Fifteen years have passed since that fateful battle...

Meet Hamel, a travelling minstrel who is so self-centered that he'd sooner cook his guardian crow (and family friend), Oboe, than go hungry for even a minute. Welcome to the world of music and hilarious insanity that is the Violinist of Hameln. Watch as Hamel takes cheap shots at his opponents and bashes pigeons with his giant violin and turns them into dinner.

How WILL the world be saved from Maou Kestra with a hero such as this?

(Source: MU)

Hameln no Violin-hiki

ハーメルンのバイオリン弾き

Adachi, Mitsuru

The story is set in a place very similar in appearance to Earth in the Edo period. However, Adachi (the mangaka) regularly reminds the reader all throughout the series that the setting is another planet in the distant future which just happens to look like Earth.

After the death of his mother, Shichimi sets out to join his step-brothers and -sister who live together in Karakuri Tenement, a place provided by the father they have never met. He finds out that each of them had different mothers (all of whom have died), but were fathered by the same man. Not long after Shichimi's arrival, the siblings decide to journey to visit the graves of each of their mothers. On this journey, they encounter many dangers.

(Source: Wikipedia)

Nijiiro Tougarashi

虹色とうがらし

Manabe, Jouji

It`s face-to-face confrontation when Kahm stares down her father and refuses to end her relationship with Tetsuya. In retaliation, her father sends a punitive fleet to Earth -- with orders not only to crush the rebellion but to annihilate the entire solar system!

(Source: Amazon)

Outlanders

アウトランダーズ

Kanzaka, Hajime

Araizumi, Rui

Young sorceress Lina Inverse and her dim-witted sidekick Gourry Gabriev travel through a somewhat medieval setting, doing good and fighting evil. Well, by "doing good and fighting evil" I mean "stealing from corrupt rich people and blowing things up".

The stories in this volume are occasional tie-ins to the novels and short stories. 

(Source: MU)

Slayers: Medieval Mayhem

スレイヤーズ

Sanjou, Riku

Inada, Koji

1-2. Dragon Quest IV Gaiden: Jigoku no Meikyuu
3-4. DQ I Hiden: Ryuuou Baribari-tai

Dragon Quest IV Gaiden: Jigoku no Meikyuu - Dragon Quest Tanpenshuu

ドラゴンクエストIV外伝 -地獄の迷宮- ドラゴンクエスト短編集

Obata, Takeshi

Sendo, Susumu

In a world where djinn rule and humans are enslaved, Toto and Loukir break the seals of the century-old prison of the "gentle genie," Rampou, in order to try and save their country...

(Source: Deja-vu)

Arabian Lamp Lamp

魔神冒険譚〈アラビアン〉ランプ・ランプ

Uno, Hiroshi

At the end of 19th Century, Captain Drake, the pirate who traveled all over the world died. Rumor has it that he hide his treasure that is worth thousand millions pounds away from people. The map to this treasure is being torn into 2 parts. One part of it is owned by the military, lead by Colonel Visconti. The another part is owned by Drake's son. 

That young boy's name is Captain Kid, and with his Black Lightening sword and Kid's cunning crews the journey to find Captain Drake's hidden treasure begins.

Captain Kid

キャプテンキッド

Kuroiwa, Yoshihiro

Iizuka, Yukihiro

Raimon Ryuuta and Kuuko are sibling. Their parent is a treasure hunter, so since they were little they lives in a shrine with their parent's best friend who is an old man.  

Ryuuta and Kuuko are interested in anything strange, curious issues. Together they set up their business as a Fushigi Hunter, to solve cases of strange paranormal activity people asking them for help.

Fushigi Hunter

不思議ハンター

Shibata, Ami

Hero and Mii are two newlywed 6 year olds. And that's only the beginning!

(Source: M-U)

Freeman Hero

自由人HERO / フリーマンヒーロー

Ishinomori, Shoutarou

Chobin is a funny creature that falls on the ground after the capture of his home planet by the tyrannical forces of Brunga, a demonic figure in a dark coat with bat-like wings.

(Source: MU)

Hoshi no ko Chobin

星の子チョビン

After pilfering as many valuables from a band of thieves as she can carry, Lina Inverse—self-proclaimed beauty and genius sorceress—departs with the gift of a fireball into the heart of her unwitting patrons’ campsite and continues on to Atlas City with dollar signs in her eyes. Before she can get very far, a horde of the surviving bandits ambushes Lina with vengeance on their minds. But sooner than she can put these one-dimensional goons out of their misery, a gallant wandering mercenary enters the scene, mistaking Lina for a damsel in distress.

Lina gladly plays the role and lets the swordsman, Gourry Gabriev, do all the work for her. Soon enough, however, she comes to regret her decision, as Gourry insists upon his honor on escorting Lina the rest of the way. The thought sends shivers down her spine, but when the original owners of her stolen goods come to take them back, Gourry proves more valuable than anything of theirs. Figuring out that whichever item they seek is being tracked via magic and that some big names are attached to what is quickly becoming quite the scandal, Lina realizes that something far more precious than money has fallen into her hands.

[Written by MAL Rewrite]

Slayers

Takeuchi, Naoko

"The Pretty Guardian in a Sailor Suit! Sailor Venus has arrived!"

Thirteen-year-old Minako Aino is an active tomboy who loves idols and video games, and is a popular member of Shiba Koen Junior High School's volleyball team. One day during her PE class, Minako accidentally stumbles upon a white cat, who later sidetracks her from talking to her crush. At home, Minako wonders if she is beautiful, and hearing this, the cat introduces himself as Artemis and gives her a compact mirror that shows Minako more than just her beauty.

Before she can fully take in the cat's words, Minako receives a special pen that can transform her into the masked champion of justice, Sailor V! As her carefree love-seeking days begin to include adventures against the energy-seeking Dark Agency, Minako will learn to embrace the full extent of her destiny.

[Written by MAL Rewrite]

Manga Like Dramatic Irony