Seinen Manga Online | MangaNato

Ueno-kun wa Kaihatsuzumi

"Spring! My college debut! The blossoming of my sexuality! Even now, I can't cum without being harassed by them." An unfortunate story in the spring of youth.

Hito Kui

Multiple instances of mysterious mass deaths are erupting all over the city. The only similarity between each mass death is the time in which the victims were found dead. Trainee doctor Sasaki finds himself in the midst of one of these mass death events. He must now fight his way out of a dungeon ruled by a man-eating monster: "Hitokui." As other humans are slaughtered and eaten alive around him, will he be able to escape out of this dungeon and bring an end to these mass murders?

Another World Sniper Is Female Warrior's Mof-moffy Pet

Following his passing and reincarnation into a foreign dimension, a 31-year-old firearms enthusiast is penniless and now a cute, furry creature. Despite this transformation, his invaluable knowledge of weaponry proves to be useful as he teams up with a female warrior to explore their new environment. Get lost in this captivating story of fantasy and rebirth!

Jin: Anime Seirei no Moribito Gaiden

Set six years before Seirei no Moribito, this is the origin story for Jin, one of the Imperial Hunters.

One-Day BDSM Workshop

After two years trapped in the dull rhythm of daily life, Heesu has grown numb—disconnected from herself and everything around her. But when she stumbles across a cryptic online ad offering a one-day BDSM roleplay experience, something stirs. Torn between fear and curiosity, she agrees to surrender control—if only for a day. What begins as a fleeting escape soon becomes a raw plunge into desire, power, and vulnerability. As boundaries blur, Heesu must confront not just the limits of pleasure, but the aching emptiness she's been running from. Original Webtoon Official Translations: English, Japanese

Huashan Sect's Greatest Genius of All Time

Baek Un-ho, a third-generation disciple from a respectable family but lacking inner strength, may be expelled from the Mount Hua sect. However, one day he stumbles upon a fateful encounter with Mong Won-kyung and emerges as an unparalleled prodigy of the Mount Hua sect. Just how powerful will Baek Un-ho become?!Original Webtoon:,

Chicano KEI: Beikoku Gokuaku Keimusho wo Ikinuita Nihonjin

The true story of Kei, a yakuza who was arrested in Hawaii in the 1980s and sent to the most dangerous prison in the United States.

A Legend of Ultimate Hot Rodder

Ryoko's focus was solely on track before her ambition was cut short by an injury. However, a day out with friends introduced her to the exhilaration of car racing, especially when she noticed a female driver of similar age. Her curiosity led her to try out drifting, even though she had never driven before. Immediately, a new passion ignited, accompanied by numerous challenges to overcome.

Anatatachi Soredemo Sensei desu ka!

Cohabitation Romcom about a high school boy whose parents run an inn for a bunch of female teachers from his high school. However what are usually strict educators at work have a completely different, much more liberal attitude at home, getting the high school boy living with them in various lewd situations.

Heterogenia Linguistico

With a focus on deciphering the communication mechanisms of monsters, Hakaba is a field linguist. However, when his professor experiences a tragic hot-air balloon accident, Hakaba is compelled to step up and resume his mentor's research in the Netherworld. During his first encounter, he comes across Susuki, his teacher's half-human, half-werewolf offspring. Together, they embark on an expedition to analyze the languages and customs of various creatures they meet on their journey, starting with the Goblins' Cave. The Heterogenia Linguistic: Ishuzoku Gengogaku Nyuumon documents their voyage through the Netherworld.

Kamo no Negi Niwa Doku ga Aru: Kamo Kyouju no "Ningen" Keizaigaku Kougi

Youhei Kamo is a genius economist whose "Camorism Economic Theory" has gained worldwide acclaim. In a society where the economically weak are exploited and cheated, he puts his economic theories into practice and feeds poison to the powerful...!

Hochiya-san wa Amari Aru

Tensei Kaku Gamer: Ouji demo Kateru Isekai Kouryaku

A middle-aged fighting game player, Kairu Mitsushima, whose life was changed in the past by an encounter with the "living legend" of the fighting game world, Daigo Umehara, is reincarnated into another world after a traffic accident... There, he finds a brutal world where battles are fought using the knowledge and skills of fighting games...!?

Reincarnated Fighting Gamer

Kairu Mitsushima, a middle-aged fighting game player who had his life changed after meeting Daigo Umehara, a “living legend” of the world of fighting games, is reincarnated into another world after a traffic accident…This world turns out to be a heroic world where battles are fought using fighting-game knowledge and techniques…!?

Lunch Banchou Hitomi

Hitomi Shinousaka is known as the "Lunch Boss" on account of her unparalleled passion for lunch. Day after day, she relies on her "lunch antenna" to discover a new "good lunch."

Graymark

Original Webtoon:,

The Soot-Covered Hero ~Saving the World with Dark Heretical Skills~

One day, a crack suddenly appeared in the sky. Magatama (evil spirits) spilled out from it, transformed into demonic corpses using living creatures as vessels, and began attacking the human world. Orbs appeared to counter these, and those who obtained them became Slayers, tasked with protecting this world. Arata, an 11-year-old boy, obtained the jet-black Orb of Soot, which is not one of the five Slayer attributes. An outcast who cannot be assigned to any attribute, Arata honed his power to control soot, which eventually became a weapon that would shake the world.

I Have a Crush at Work

Recently, Masugu Tateishi and Yui Mitsuya have started a romantic relationship. Masugu is hardworking but has a tendency to be swayed, while Yui seems structured but has difficulty with keeping secrets. Will they be successful in hiding their romance from colleagues and maintaining a positive work-life equilibrium? Keep reading to find out the captivating conclusion to this workplace love story.

The Old Prisoner Lives in Solitude

“Solitude” the deadliest prison in the universe, Karaismán. Its structure changes daily, and thousands die within its walls every single day. Yet, there is one infamous Inmate who has survived for 64 years: Argel Lastos. Though officially ranked as nothing more than a Class-1, Argel has always emerged victorious no matter who he fights, regardless of their level. He survives through strategy, combat prowess, loyal allies, and knowledge. To maintain his aging, frail body, Argel made a contract with Karaismán’s creators the very ones who designed “Solitude.” In return, they assign him a mission: to protect a “product” of great value. This time, that “product” is a blond-haired boy… Thus begins an intense and overwhelming tale, a dark sci-fi fantasy action story starring the universe’s strongest old man. Original Webtoon: KakaoPage, Daum Official Translations: Japanese

She Recommends a Harem

A shocking statement from a girlfriend that you can’t understand after sex?! "Honey, don’t you plan on starting a sex cult?" A special harem project for a boyfriend with a ton of stamina. The goal is seven women who will fill up the week. Original Webtoon

Fantasy Enlistment Squad

Jeok‑un Mountain Pass is a front‑line border zone between the demon race and the interspecies Federation—a strategic strongpoint where training and real combat happen simultaneously. The Federation military, following prophecies from an ancient scripture, is searching for the foretold “Ten Transcendents” who will help reclaim lost territory, so conscription and selection processes are in constant operation. However, what the recruits discover is that something even more terrifying than war with the demons awaits them: the absurdity and brutal hazing of military life itself. This is a dark fantasy story about surviving not just monsters, but the suffocating reality of military culture in a fantasy world. Original Webtoon: Naver Webtoon, Naver Series

A Parallel World With a 1:39 Male to Female Ratio Is Unexpectedly Normal (Colored)

Satou Sou is accidentally swapped with himself in a parallel world with a male/female ratio of 1:39. He finds a kind family and lovely women at the place where he was switched. Seeing the outside of these women, he's relieved to see that the number of men and women has changed, but not much else. However, their inner lives are filled with conflicts and troubles.

Synonym

I Was Immediately Mistaken For A Monster Genius Actor

I, Kang Woojin, was quitting my design work and became a jobless person. The next day, my friend took me to auditions and I was forced to perform.As i was given a script, the void space appeared in my mind and forced me to relive the character.I got stabbed. Became a serial killer. Became an Exorcist.As I become an actor, the misunderstandings keeps growing day by day.Original Webtoon:,