Tsutsui, Taishi

Famous detective Syd Craft. He's solved the toughest cases and he's adored by the public, but even he has a major problem!

(Source: MANGA Plus)

Included one-shot:
Volume 3: Mangaka no Neko de Aru.
Volume 4: Bokutachi wa Benkyou ga Dekinai Tokubetsu-hen, Yosame Hakuro wa Korosenai

Syd Craft no Saishuu Suiri

Syd Craft: Love Is a Mystery

シド・クラフトの最終推理

Noramame

One day, private detective Kanako Udagawa receives a request from client Yuiko Shinonome to conduct surveillance on her fiancé. But when Detective Udagawa drops by the fortune-teller that the fiancé's been visiting on the sly, she encounters a boundlessly bubbly woman called Sakura! See the slapstick suspense unfold with this pair of polar opposites!

(Source: MANGA Plus)

Tantei to Uranaishi

The Detective & the Fortune Teller

探偵と占い師

Hitotose, Hirune

"The relationship between detective and assistant is not unlike romance!" Because of his natural tendency to assist others (a "helper type" personality that makes him constantly want to lend a hand), Tasuku Mitomo has always lived in the shadows. To get out of this rut, he has made it his utmost priority to "become number one." However, at the high school he transfers to, he encounters three detective girls, who turn out to be his rivals from elementary school with whom he had formed a detective club! Thus begins Tasuku's fierce battle to support the top detectives! However... these girls seem to harbor passionate feelings of a different kind...!?

(Source: Kodansha, translated)

Isshou Watashi no Joshu de Ite!

一生わたしの助手でいて!

Juujou, Negi

Bouken ni Iku Fuku ga Nai!

冒険に行く服がない!

NISIO, ISIN

Demizu, Posuka

The spin-off stars an adult B.T., who is employed at Dinosaur Hotel in Las Vegas as a magician. After watching B.T.'s magic show, Koichi Mugikari learns that B.T. is actually employed for helping the hotel's casino handle gamblers who have unusual winning streaks. 

(Source: JoJo Wiki)

Makouseinen B.T.: "Busou Smoker" Jiken

Cool Shock Guy B.T.

魔好青年ビーティー「武装スモーカー」事件

Kotoyama

A long-awaited bonus volume that provides a look into the future of the characters after the conclusion of the beloved manga series. Kou embarks on a life of vampire hunting!

(Source: VIZ Media)

Yofukashi no Uta: Rakuen-hen

Yofukashi no Uta: The Paradise Arc

よふかしのうた－楽園編－

Asagiri, Kafka

Hoshikawa, Shiwasu

It's been roughly one year since Chuuya Nakahara joined the Port Mafia, and he's got his sights set on an executive position. But as he makes plans to move up, a man by the name of Paul Verlaine—claiming to be his younger brother—appears and vows to assassinate everyone he cares about! Now, Chuuya must team up with Adam, a European A.I. investigator, to stop this lunatic before the storm swallows Yokohama once again...

(Source: Yen Press)

Bungou Stray Dogs: Stormbringer

文豪ストレイドッグス STORM BRINGER

Ueda, Yuuri

"All you've made is adult goods!" Orga-Zum, whose alchemy skill turns everything into "adult goods," ends up kicked out of the party for "bringing our rank down." However, the female knight CKK Rose appears and discerns Orga's true power. The "Sex War of the End," to save the world from destruction by lust monsters, begins now.

(Source: Kodansha, translated)

Tsuihou sareta Renkinjutsushi, Adult Goods de Sekai wo Sukuu: Donna Monster mo Zettai ni Ikaseru Otoko

追放された錬金術師、アダルトグッズで世界を救う ～どんなモンスターも絶対にイカせる男～

Umiharu

The manga is set in a certain "eastern country," where the commerce and use of an illegal drug named UDL has spread widely following the end of a devastatingly long war. Here, a boy named Ibuki is searching for his long-lost mother. One day, he meets a mysterious girl named Mylphy, and Ibuki's search for his mother will begin to take on a surprising twist.

(Source: ANN)

Bloodict

ブラディクト

Cockrocheaps

Sakamoto, Kafka

Takashi e, Yuuhan wa Dungeon no Oku desu

タカシヘ、夕飯はダンジョンの奥です

Kizuku

The mysterious creatures that suddenly appeared are... Moimon.

A charming exterior, balanced against an inherent savagery and tough bodies. At first glance, it appeared that humanity had finally established a master-servant relationship with them through training... But as a new found ferocity spreads through wild Moimon, the continued survival of the human race is in question.

Kakeru is a boy from a warrior tribe that survives by hunting Moimon. Shimizu is a girl dreaming of adventure. Together, they set off to gather clues to stop the ferocious mutation of these creatures.

And so rises the curtain on a new and exciting monster battle action series featuring bizarre creatures called Moimon and the boy who hunts them!

(Source: Square Enix)

Manga Like Meitantei Conan: Seikimatsu no Majutsushi