Seinen manga

Yuri na Watashi to Akuma na Kanojo (?)

Yuri na Watashi to Akuma na Kanojo (?)

As a child, Yashiro Nonoyama developed an intense fear of men due to boys constantly bullying her. Now in high school, she dreams of being reunited with her first love: a girl who protected her one day from her bullies. Yashiro is in disbelief when a transfer student named Mikoto Saionji arrives who looks a lot like her first love, but she later discovers that Mikoto is actually a guy, and that he was her first love. Yashiro learns that Mikoto is rapidly turning into a girl, and the only way to counteract this change is for them to passionately make out with each other every day.

Zeb-Noid

Zeb-Noid

A bloody war that spans millenniums. Two soldiers set out to kill each other. An encounter that could change their two species’ fate forever.

100-man Volt no Kanojo

100-man Volt no Kanojo

From MangaHelpers: Narugami Kyoko is a 14-year-old girl with extraordinarily high amounts of static electricity. She shorts out electronics, shocks people, frizzes out people's hair, and makes their clothes full of static. Understandably, most people at school avoid her, except for her friend Hikari. This 4-koma style manga features her humorous everyday school life as she hangs out with Hikari, interacts with teachers, and tries to become closer to her other classmates despite her electricity problem! [tethysdust]

Zennou no Noa

Zennou no Noa

In the year 2038, a white light descended on the center of Tokyo and stole the memories of over one million people. The cause of this horrible incident was not determined, and no cure was to be found. The government formed a separate city beneath Tokyo to house and care for the victims of the incident and branded them as "KIDz." Regardless of their age, they truly are like children, and they must be retaught everything they once knew. Noa Ikurumi, who lives in this isolated society, is just taking one day at a time and dreaming of finally being allowed to go back out into the world. But Noa's life will once again change drastically on the day that he is taken hostage by a terrorist with some surprising information about his identity...

Yuria 100 Shiki

Yuria 100 Shiki

Yuria is a humanoid dutch wife (love doll), a female android designed with the sole purpose of being the sex slave of her master. But she has one flaw: she doesn't want to be a dutch wife. After escaping from her creator, she meets Kubo Shunsuke, who gives her a place to stay. Hilarity is bound to ensue as she battles her programming, which draws her towards him and pretty much any other man she comes across.

Yuzuko Peppermint

Yuzuko Peppermint

Yuzuko was left alone after her grandmother passed away. Shadowed by a mysterious organization, her family murdered by a psychopath, and with the sudden "breakdown" of the world, the missing pieces to everything is revealed, and the "Peppermint" inside Yuzuko activates...

Zettai Zetsubou Shoujo - Danganronpa Another Episode - Genocider Mode

Zettai Zetsubou Shoujo - Danganronpa Another Episode - Genocider Mode

Based on the game of the same name, this manga takes the events from the game and puts them in the point of view of the heroine(s) Touko Fukawa and Genocider Syo!

Zansatsu! Ponytail

Zansatsu! Ponytail

A tale of two girls and a ponytail.

Yume de Aetara

Yume de Aetara

Fuguno Masuo is a hapless 24 year-old businessman who is unlucky in love, He's never even had a girlfriend! After consulting a fortune teller, Masuo believes he'll never have a chance in love. All that changes when he meets the beautiful Nagisa Shiozaki at a marriage interview pub, who herself has had the same poor luck with guys. Now he'll do anything to woo the girl, but he'll have to fend off other suitors and the affections of a co-worker, all while keeping himself out of awkward situations that always end badly for him. Originally penned by YAMAHANA Noriyuki under the pen name HANAKO.

Zetman

Zetman

It follows the life of a homeless boy living with his "grandpa". The story starts to kick off when they encounter a man trying to commit suicide mumbling something along the lines of "before it is too late". Of course from then on the action begins and the dark plot begins to unfold with each volume.

Yuuki Yuuna wa Yuusha-bu Shozoku

Yuuki Yuuna wa Yuusha-bu Shozoku

In the era of the gods, year 300. Yuuna Yuuki lives an ordinary life as a second year middle school student, but she's also a member of the "Hero Club," where club activities involve dealing with a mysterious being called "Vertex." - ANN


Zombie Hunter

Zombie Hunter

Unknown to the world aliens have begun to invade people's bodies. A young race car pilot named Toshio was won by a mysterious organization for a "test" for money. That test turned out to be a hellish training to become a Zombie Hunter. However, Toshio decided to return to a normal life but soon face the harsh reality of a Zombie Hunter. Surrounded by shallow figures and aliens Toshio accepts his new life as a Zombie Hunter ... (mangaka never finished the story)

Zero No Tsukaima Chevalier

Zero No Tsukaima Chevalier

Hiraga Saito was summoned to the wonderful world of Halkeginia through the use of magic. He was summoned by the very cute, yet with "Zero" magical ability, Louise. Although it was an accident, Saito was summoned during the summoning ceremony, and sealed the agreement to become Louise's "Familiar" through a kiss. That is how he arrived in this world. While on the way to visit the Princess of Tristain for her upcoming marriage to the King of Germania, war broke out. Because of the upcoming marriage, Conquista joined forces with Albion, declared war and began their invasion of Tristain. While drowning in despair over the disparity in military strength, Louise, by chance, got on board the Zero Fighter piloted by Saito. Her ability to use the legendary magic lineage "Void" awoke and she single-handedly ensured the triumph of Tristain over the army of Albion. And so we continue on from there to their next scene of battle.

Yuureitou

Yuureitou

From MangaHelpers: In the 1950s, an old woman was brutally murdered on the face of a clock tower by her adopted daughter. Two years later, the clock tower is known as the 'ghost tower' and it is supposedly haunted. Through an unusual series of events, a young NEET man named Amano Taichi is attacked by someone or something in the same clock tower, and finds himself bound to the clock face to be killed in the same way as the old woman. Luckily for Amano, he doesn't meet the same fate. He's rescued by a mysterious person who claims his name is Tetsuo. Tetsuo is searching for a treasure that is connected with the ghost tower, and he wants Taichi to be his partner. Taichi, whose life has mostly consisted of poverty, loneliness, and pornography, is enticed by the idea of gaining extreme wealth. He's further convinced when a house fire leaves him without a home and depends on Tetsuo's charity. The adventure is going to be very dangerous, since the same 'enemies' who attacked Taichi before seem certain to try something again! Not to mention, Taichi really knows very little about his new partner. [tethysdust]

Yuri Danshi

Yuri Danshi

From MangaHelpers: Hanadera Keisuke is obsessed with yuri, and he's read all the Yuri Hime manga. However, he is sadly aware that there is one thing a lesbian romance absolutely does not need-- him. One day, a student named Akane transferred to his class from an all-girls school. She used to go to school with another classmate, Saori, and Akane immediately tried to pick up their friendship. However, her clinginess, desire for alone-time, and intensity all convinced Keisuke that he was finally seeing yuri in reality! Soon enough, Keisuke had stalked them enough to see a love triangle between Saori, newcomer Akane, and their standoffish classmate Matsuoka. Is there truth to his observations, or is he viewing the world through yuri-tinted glasses? [tethysdust]

Yuki no Touge Tsurugi no Mai

Yuki no Touge Tsurugi no Mai

The closing stages of Sengoku (Warring States) Japan. A setting commonly explored in Japanese manga through vivid scenes of gory battles, samurai, and feats of bravery, honour, and loyalty. Iwaaki Hitoshi dares to go against the popular grain by not focusing on the 3 famous unifiers, but by depicting stories of a society in transition. Rapidly changing cultural norms and class expectations pit the old versus the young, the war-weary versus the war-mongers, and the parochial versus the foward-thinking. The first story, "Snow Ridge," explores the changing role of samurai and provinces while the second story, "Sword Dance," deals with kendo's evolution from warfare to art.

Zero - The Man of the Creation

Zero - The Man of the Creation

The man known as “Zero” is an expert on antiquities, archaeology, art, and other types of artifacts. Specifically, he is an expert on rooting out their histories and discovering any extra-special qualities they might have – curses and so on – and then gets rid of them, and he will search the world to find the answers he seeks for his clients. He charges whatever fee he feels is appropriate; it might be a million dollars, and it might just be one.

Zero no Tsukaima Gaiden: Tabasa no Bouken

Zero no Tsukaima Gaiden: Tabasa no Bouken

Spin off of Zero No Tsukaima; The adventures of Gallia's knight Tabitha

Yuujou Kakin Kalman Gain

Yuujou Kakin Kalman Gain

Ryuuiichi Sugihara is a regular high-school boy who discovers a mobile game called Karman Gain, a game with the power to alter reality by giving up life points. He soon learns the consequences of running out of life points and gets entangled deeper in Karman Gain.