Top Mature Manga Series – Must-Read Mature Manga Online Collection

Dr. Agatho Report

Chapter 24

15,026

Five years after the end of the war-.The victorious nation of Formapolis has become accustomed to peace, but something strange is happening.The illegal dumping of bizarrely shaped corpses called "experiments".Klein, a detective in charge of the Special Case Unit, is ordered by the government to investigate the case thoroughly and is assisted by an assistant, Dr. Agato.But this man, who seems to be hiding a secret, has forgotten his identity as a prisoner of war from a defeated country and is trying to seduce his partner, a state official.As Klein becomes embroiled with the unstoppable Dr. Agato, Hecomes face-to-face with Tristan, the psychic man at the center of this bizarre case.It turns out that Dr. Agato was once his 'researcher',Tristan was his 'test subject', and the secret is that they had an intimate relationship. ......."I wanted to see you again, Doctor."+

Necessity of Relationship

Chapter 20

640

Do-yoon, who dreams of living together with his childhood friend Lee Hwan, whom he has a crush on.But his mistake caused Lee Hwan's body to The soul of idol lon has taken hold!They say that a switched soul can only return after filling up its yang energy.

Reversal (Yaoi)

Chapter 29

343,784

Lee Ha-jin, who hides his real name "Yuhan" and his past, which was a "passionate omega" trait, and lives as a "beta." It has become his daily life to please Jin Seung, the son of J-Tech CEO, while holding a debt alone without a family. One day, Ha-Jin, who reunited with Sung Hyeop, his first love in high school, at a meeting place with a client. Seong-hyeop, the son and friend of a driver who lived and slept at Hajin's house in the past, became the CEO of a large company. Two people still clearly imprinted on each other's pheromones even after 10 years. In the past relationship between the two, Seong-hyeop proposes a sex partner to monopolize Ha-Jin, who left him.

Rebirth as The Villainous Duke

Chapter 5

873

Born Again to Be a Bad Duke! Since everyone considers him evil, he will break every rule of the world to find his way home!

Fight Club

Chapter 61

45,532

Minchan has lived his whole life as part of the elite top 1%—an Alpha who always wins. Bored with his perfect life, he accepts a friend's invitation to join Fight Club, a brutal underground arena where only fighting skills matter. What starts as a casual thrill quickly escalates when Minchan begins competing himself—and winning easily, just like always. But just as victory starts to feel hollow, he faces an opponent he can't beat: Taewook, a smaller, seemingly fragile Omega. Crushed by his first-ever defeat, Minchan is furious—and obsessed. He approaches Taewook, only to be met with complete indifference, a blow to his pride he can't ignore. Then one night, fate strikes: Taewook enters his heat cycle, and Minchan doesn’t miss his chance. Pride, instinct, and raw attraction collide— In this fight, winning might mean losing everything Minchan thought he knew. --- **Original Webtoon:** **R19:** [Ridibooks](https://ridibooks.com/books/505081090), [Bomtoon](https://www.bomtoon.com/detail/vkdlxmzmffjq_19), [Lezhin](https://www.lezhin.com/ko/comic/fight_club), [Naver Series](https://series.naver.com/comic/detail.series?productNo=11124014), [MrBlue](https://www.mrblue.com/webtoon/wt_000063069), [BookCube](https://www.bookcube.com/toon/detail.asp?webtoon_num=240493), [MComics](https://www.mcomics.co.kr/webtoonComic/12256), [ManhwaSub](http://sub.manhwa.co.kr/pre_sm/detail/read.php?no=3399221), [Toon365](https://www.toon365.com/domestic/domestic_detail.asp?toon_idx=44983), [Aladin](https://www.aladin.co.kr/shop/wproduct.aspx?ItemId=340020083), [KyoboBook](https://ebook-product.kyobobook.co.kr/dig/epd/ebook/E000007625321), [Yes24](https://www.yes24.com/Product/Goods/126679141) **R15:** [Ridibooks](https://ridibooks.com/books/505081100), [Bomtoon](https://www.bomtoon.com/detail/M_Bride), [Lezhin](https://www.lezhin.com/ko/comic/fight_club_15), [Naver Series](https://series.naver.com/comic/detail.series?productNo=11124015), [MrBlue](https://www.mrblue.com/webtoon/wt_000063072), [BookCube](https://www.bookcube.com/toon/detail.asp?webtoon_num=240494), [KakaoPage](https://page.kakao.com/content/64197814) **Official Translations:** [English](https://www.lezhinus.com/en/comic/fightclub)

Rolling in Bed with the Male Lead

Chapter 10

325

Richard, the second male lead, has failed to win the heroine's heart across dozens of regressions. Every time, the heroine ends up with the trashy male lead, leaving Richard—destined to be the second male lead—discarded and alone. Unable to watch her choose the male lead once more, Richard decides after forty-eight regressions to try one final method: seducing the male lead himself.

Risou No Himo Seikatsu

Chapter 102

17,920,513

One day, average salaryman Yamai Zenjirou has an out-of-this-world experience—literally! He's pulled from Earth and dragged to another world where magic thrives and a gorgeous, powerful queen needs a consort. Now he's being pressured to marry that very monarch and help her bear a child. Will Zenjirou accept this life of lazy, luxurious love at the cost of leaving his home behind?

Shock-A-Bye Baby (Novel)

Chapter 44

6,188

Huido hasn't seen his father since he was a little kid. One day, Woorak, a debt collector, pays Huido a visit, claiming that Huido's father disappeared after taking out a huge loan. Huido, who has an irrational fear of middle-aged men, was left with no choice but to tase Woorak and lock the man up in the basement. But Huido's heart starts beating fast... could this be love?As Huido finds himself smitten with Woorak, he does his best to seduce the man. However, the mister seems just as strange as he is! The story continues to tell a shocking tale of love that dips between common and uncommon sense.Official English

Miss Zuo Ying

Chapter 29

35,538

Zuo Ying, a once-renowned criminal investigation expert at Huanyang University and a prominent figure in the legal community, was brought to trial by her own daughter, Zuo Yang, who accused her of crimes. Just as Zuo Ying was about to be sentenced to death, the court abruptly changed her sentence, ordering her to be confined in an insane asylum instead. Due to her success in solving this case, Zuo Yang was promoted rapidly. However, soon after, a series of murders broke out in the city, and unable to solve the cases, she was forced to seek her mother's assistance. Facing her mother, who had once brought her love but now only left behind a complicated and indescribable mix of emotions, Zuo Yang felt a thin layer of sweat form on her cheeks. "My darling daughter, if all it takes is a little pleading to get my help, why not?" Zuo Ying said, glancing at the newspaper in her hand, squinting as she smiled. The shackles on her hands were so conspicuous—who really was the caged bird here?

Between Two Men's Secretary

Chapter 41

871

Original Webtoon: Naver Webtoon, Naver Series

The Visitor Of The Night

Chapter 61

32,808

Four years ago, after Seyeon lost her memories for five months, she began to dream of this every night. A dream where she made love to a man whose face she couldn’t see and whose identity remained a mystery. His body was strong, but his touch was gentle, and every movement he made was mesmerizing. Every time Seyeon felt those clear sensations, she was rendered confused, wondering who this man was. Was he her lover? The father of her child? Or just a man she knew for one fleeting night? Amidst the doubts that remained unanswered, one day, she met Soohyuk, her father’s personal doctor who had just moved from America. And when Seyeon first saw him, she felt an inexplicable sensation… A strangely familiar feeling. At the same time, when Soohyuk looked at her, his face froze in shock.

Don't Mix Business With Pleasure!

Chapter 93

947,848

not found...

Males In The Breeding Room

Chapter 34

976

<Synopsis> [The sensual romance between researcher Seha and five breeding males] Seha takes a job at a research institute as both a researcher and a breeder. She is assigned five male subjects from whom she must collect reproductive cells. However,...

Save Yourself

Chapter 26

2,699

[Original Webtoon](https://www.bomtoon.com/detail/save_self) **Official Translations:** [T.Chinese](https://www.bomtoon.tw/detail/save_self), [French](https://www.lezhinfr.com/detail/bt_1110796)

Celestial

Chapter 58

863

not found...

Over Rev!

Chapter 298: The Woman Of Destiny

4,061,845

Over Rev! is a manga about a senior graduate named Ryouko. A while back, she injured her ankle in a track meet. Since then, she didn't know what to do with her life, until she finds out about street racing… Official Release: - Indonesian release by Level Comics as Over Rev (2008)

The Tiger's Night

Chapter 4

455

Beom Tae-Hyeok buys Moon Yi-Soo for 100 million won while she is working as a server at a loan-shark club to pay off her boyfriend's debt. "You’ll have to prove you’re worth 100 million won," he says. "How?" "With your body." When Yi-Soo asks if she can just work to pay it back, Tae-Hyeok sneers coldly. "I don't need the money. I need a maid to play with." Eventually, Yi-Soo signs the maid contract, and from that night on, her body and heart begin to surrender to Tae-Hyeok in their dizzying encounters. Original Webtoon: Naver Series

Dead Pivot

Chapter 47

1,265

Ball: Cha Yeon-woo (20)A-class guide. An innocent beauty who looks good with white hair due to manifestation. In the first matching test with Ji Seo-joon, he had an unprecedented matching rate. He has a sincere and gentle personality, and was rescued by Ji Seo-joon at the scene of a gate accident when he was a child. Since then, I've admired Seo-joon."Even if I am lacking a lot now, I will try to do better and better. So ......."Su: Ji Seo-jun (29)The strongest S-class esper in Korea. After losing his first guide a long time ago, he has refused to sign a dedicated contract. It has recorded a low matching rate with anyone, and it has long since avoided full-fledged guiding, so it is not known when it will run wild. A cold handsome man with a face that is always sensitive and tired."I don't need a dedicated guide with a lot of tears."Look at this time: When you want to see a self-proclaimed nonchalant who falls in love with the chastity of a nice and beautiful beauty, or when you want to see a love story where you only look at each other at the crossroads of life and death.Sympathetic text:I can't believe I can kiss like that again next time.If I become a dedicated guide, I can continue to be by his side.......+

On-Site Arrest!

Chapter 46

11,663

After striking out on his 100th job interview, Jung Hyeong decides to resort to his old ways and steal againthis time targeting a man who oozes wealth while carrying a designer bag. But when he opens the bag, he discovers a treasure trove of surprisesand the wealthy man? Let's just say Jung Hyeong is about to uncover a whole new world of trouble!

Day and Night

Chapter 41

225

During the day, Sheng XI is an elite VP, but at night, he secretly works as a fan service streamer… One day, a handsome and radiant rich second-generation idiot appeared at his company to become his assistant. Without a choice, he now has to endure this foolish rich kid while assuring his own secret identity stays concealed. However, this seemingly sweet and naive rich kid unexpectedly also has more than one identity~ Seemingly innocent yet actually manipulative assistant x elite queen-like VP

Gunsmith Cats

Chapter 75.5

607,391

Girls, guns, and grenades! Meet Rally Vincent and Minnie May. By day, they work at the Chicago gun shop that they own. By night (or holidays or week-ends), they moonlight as a pair of bounty hunters called the Gunsmith Cats. Rally is an expert at firearms, being able to judge the condition of a gun with a glance, and being an expert marksman. Minnie May is younger and less disciplined; and has an absolute fascination with explosives. Lots of explosives. Especially big ones. Together, they form an unbeatable team; much to the consternation of the local ATF bureau. Set in the city of Chicago, this action-adventure series features a lot of gunfights, car chases, and general mayhem.

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