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

Killer Whale Protocol

Chapter 57

134

As an intern at a marine research institute, Hyo-Seo finds himself overworked and overlooked. He's given the job no one else wants: caring for the aggressive orca everyone else fears. Hyo-Seo finds quiet comfort in the beast's presence, but after he starts speaking to it, strange things begin happening at the facility... (Source: Manta)

D.Diver

Chapter 36: Blood to Entertain the Gods

952

Kagura is a college student who lost his parents in a fire when he was a child. One day he visited a courthouse as part of a seminar and that same night he had a strange dream. Was it just a nightmare or was it reality?

Miss Forensics

Chapter 57

139,375

Lin Yan, a cold and arrogant female forensic expert, meets Song Yuhan, a righteous and sharp female detective. From being incompatible to becoming friends, they witness the lives of many ordinary people along the way: a young girl who struggles to survive but dies innocently, an old mother who waits for her criminal son to return in the mountains, a timid policeman who faces a gun-wielding robber bravely... They fight for the rights of the living, speak for the dead, and vow to uncover the truth that has been silent for years.

The Unruly Immortals

Chapter 91

788

High schooler Li Huowang can close his eyes and be transported to an uncanny world. Over there, he is a medicine primer who will be made into pills by his "Master" at any given time. Meanwhile, in the real world, Li Huowang is living in a mental hospital, unfit to continue school. The doctor told him that the uncanny world is just his hallucinations. What is real, and what is fake? Li Huowang really does not know. <a href="https://ac.qq.com/Comic/comicInfo/id/656073" target="_blank" rel="noopener noreferrer">Original Manhua</a> Official Translations: <a href="https://www.webnovel.com/comic/abnormal-immortal-record-of-spooky-daoist_31463636800272701" target="_blank" rel="noopener noreferrer">English</a>

The Perfect Groom: Will You Offer Him True Love?

Chapter 25

337

A super high‑spec “Groom” chooses his one and only “Fated Bride”—that’s the concept of the wildly popular marriage‑hunt reality show “Perfect Wedding Project (PWP).” Magazine editor‑in‑chief Chisa, standing on the brink of losing her job, stakes everything on a comeback by entering the show as one of the bride candidates. The women gathered as candidates are all formidable rivals: celebrities, models, influencers, and more. The Groom they’re all aiming for is REX, a young entrepreneur who operates on a global scale. Status wars between brides, psychological games with REX, and secrets hidden behind the show’s production… At the end of it all, what will Chisa end up grasping—true love, or something else entirely?

The Murderer is Targeting the Young Lady with Brown Hair

Chapter 43

211

[Original Webtoon](https://ridibooks.com/books/4116004613) **Official Translations:** [Japanese](https://www.amazon.co.jp/-/dp/B0D95PNP65/), [Thai](https://www.webtoons.com/th/romantic-fantasy/the-killer-targets-the-brown-haired-lady/list?title_no=8323)

That Night, I was with That Girl…

Chapter 20

900

Right after getting his heart broken, Nao Michigami attends the after-party of a friend's wedding. He drinks too much and wakes up in bed in a love hotel. He has no memory of the night before! To find out who he spent the night with, Nao meets up with each of the women he met at the after-party to find out "what happened". A new type of love comedy for adults, as he searches for "the one who might be his soulmate"!

Shikizaki Shimai wa Abakaretai

Chapter 59

483

One day, Tarou Yamada, who runs a detective business, slips on a banana peel and reincarnates into Tsukushi Shikisaki, the younger brother of three beautiful big-breasted sisters who will all die on the same day. As he spends time surrounded by the three beautiful sisters, he finds out that the boy he is reincarnated as will be killed by one of the three sisters.

Reiwa no Dara-san

Chapter 54

951,756

Seeing it brings misfortune; defiling it brings a curse? Introducing a new era of strangeness, abandoning seriousness!On a stormy day, a landslide destroys a fence, and siblings who ventured into a long-prohibited area encounter a terrifyingly bizarre creature..."I'm a curse g**, you know!? Don't you think anything of this grotesque form?!?"The unflappable siblings, rather than being scared, casually call the creature "Dara-San" and grow fond of it!?Seemingly scary but not at all! A new era of occult comedy that leaves seriousness behind.

Children of the Sea

Chapter 43.5: Chapter 43.5 - Volume 5 (XRA-Empire)

727

Ruka's dad and the other adults who work at the aquarium are only distantly aware of what the children are experiencing as they get caught up in the mystery of the worldwide disappearance of the oceans' fish.

Unraveling Memories: The Trauma Cleaner

Chapter 24

276

Ha-seon is an estate cleaner. He possesses a special power to read 'memories and emotions' from the traces left behind by the deceased. He works at an estate cleaning office named 'Yuwa'—a place that picks up and delivers the innermost thoughts of the deceased that even their surviving families do not know. One day, Ha-seon saves a woman named So-hee, who was attempting to take her own life. This encounter leads her to join 'Yuwa' as an estate cleaner as well. Original Webtoon Official Translations: Japanese

The Secret Tutor of Lord Preston

Chapter 25

277

A woman with a hidden past takes on a discreet position as a private tutor in the prestigious Preston household. Tasked with educating a young noble, she quickly realizes that the estate holds more secrets than she anticipatedespecially its enigmatic master, Lord Preston.As she tries to keep her own identity concealed, unexpected tensions and a growing attraction begin to form between her and the lord of the house. But with secrets on both sides, their relationship walks a dangerous line between trust and deception.

Swans Grave

Chapter 56: Side Story 8

352

Anna, a dimension traveler, enters the ominously nicknamed “Swan’s Grave”—the Loengrin Marquisate—as a maid, in hopes of finding a way back to her original world. There, she encounters Marquis Rothbart, who mistakes her for his long-lost wife and forcefully claims her. Soon after, he makes a shocking proposal: “Become my wife’s replacement.” He also reveals the only way for Anna to return to her world: she must bear a child with someone from this world. As she hesitates, Rothbart’s son, Svanhild, also lingers by her side, pleading: “I want a mother, Anna.” A relationship doomed from the start. A condition she cannot refuse. Desperate to return home, Anna accepts Rothbart’s proposal… Original Webtoon: <a href="https://ridibooks.com/books/4328000335" target="_blank" rel="noopener noreferrer">Ridibooks</a>

The Grudge

Chapter 61

979

After being betrayed and murdered by his fiance, the gang's young leader, Charles Ji, accidentally time-traveled back thirty years, ending up in the body of a 19-year-old boy. This fallen young Alpha is then rescued by a gentle, kind-hearted young Beta. Yet this angelic savior bears the exact same face as the fiance who murdered him in his past life...

Rebuild World

Chapter 85

289

At the risk of his own life, a young man sets foot in the ruins of a devastated old world. His name is Akira, and in order to claw his way out of the hellhole that is his birthplace of Slumtown, the boy became a hunter. In the wastelands he happens upon a strange woman, standing perfectly still, stark naked. She is beautiful, but it seems that only he can see her. She exists incorporeal, tantalizingly beyond any touch, and she tells him her name is Alpha. Alpha won’t show even a sliver of her real intentions, but with a wide smile, she brings Akira his first commission as a hunter. Akira takes the task, if only to become a stronger hunter, and having entered a contract, their dramatic lives in the hunting profession was set to begin. From Stories of the Boy Hunter as recorded by the Eastern Hunters’ association. Written post-collapse of scientific civilization.

7's

Chapter 21: Dimensional Rider 4

156

A pretty girl, Tamura Nagisaki, appears before an ordinary high school boy. When she says, "Will you protect me?", his ordinary life is thrown into a tailspin. The pleasure killer, Dimensional Rider, kills Nagisaki without a motive. With Nagisaki's death, time between the two loops back and forth. Can the two escape the carnage and infinite loops…?

Flame of Love's Guilt: The Popular Mom-Celeb's Hidden Face Was an Affair Monster

Chapter 14

113

Shoji Hoshino, a venture CEO and darling of the era, is a picture-perfect husband who even handles the housework. However, his wife Erena, who reigns as the "ideal mother," has a hidden face: she is a monster who constantly engages in affairs and tyranny. To win custody of his daughter, a man scorned as a "worst husband" solely for his looks uses his wits to wage a reverse-revenge drama, socially destroying his celebrity-mom wife.

Diary of A Deceased Girl

Chapter 15

628

Original Webtoon

Whispering Tiger

Chapter 15

519

After receiving a scathing text from his roommate, Geon-Pil is puzzled but unperturbed when said roommate returns radically changed. The new “Yeon-Seung,” driven by a primal, insatiable hunger, takes his friends-with-benefits relationship with Geon-Pil to the extreme to sate himself. As their physical encounters grow increasingly intense and feral, Geon-Pil slowly realizes that something is amiss. Even as whispers of danger warn him to back off, Geon-Pil finds himself growing comfortable with this strangely honest, dangerous new version of his partner… who just might devour him whole. (Source: Tappytoon)

Birdy the Mighty Evolution

Chapter 126: Peridan's Forbidden Book #21

516

After two years of being dormant inside Tsutomu Senkawa, an accidental encounter with their old nemesis violently wakes Birdy up. With Birdy kicking evil's ass once again, the dark secrets of the experiments conducted by the "Agni" corporation are slowly revealed. They seem to be dabbling with human body enhancement, creating what they call "beast men," to combat the alien invasions related to Birdy.

Dear Cheat Spouses: Punishing My Controlling Husband and My Cheating-Addicted Wife

Chapter 15

248

Makoto, a housewife, lives a life where she is yelled at by her husband Kenji over the seasoning of miso soup, restricted in what she can buy, and subjected to constant surveillance. Believing she still needed to be grateful, Makoto's eyes are finally opened when she discovers her husband's affair, and she resolves to take revenge. As part of her plan, she approaches Takumi, the husband of her husband's mistress, only to find that he is also suffering from a wife who is addicted to infidelity?! The obedient "puppet" of a betrayed spouse plunges the scum intoxicated by their affairs into the depths of despair in this exhilarating and sophisticated revenge entertainment!

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