Best Mystery Anime to Watch Free & Legally

In the prestigious Johanestahl Hospital, Dr. Kenzou Tenma is poised to become a leading neurosurgeon, with a bright future ahead and a fiancée from a prominent family. However, a pivotal moment of decision-making sets him on a drastically different path. When a wealthy patient's life hangs in the balance, Dr. Tenma is forced to choose between saving a famous performer and a young immigrant worker. The consequences of his choice are far-reaching, leading to a crisis of conscience and a loss of social standing. Years pass, and Dr. Tenma's fortunes change once more. Following the mysterious deaths of several colleagues, he is cleared of any wrongdoing and rises to the position of hospital director. Yet, the specter of his past continues to haunt him. When he saves the life of a notorious criminal, his encounter with the enigmatic Johan Liebert sets him on a quest for redemption. Dr. Tenma must confront the chaos unleashed by the boy he once saved, and navigate a complex web of morality and justice to make amends for the harm caused by his past decisions.

In the opulent imperial court, a young apothecary's daughter named Maomao finds herself torn from her peaceful life and thrust into the shadows as a lowly maid. She conceals her extensive knowledge of medicine to avoid drawing unwanted attention, but her curiosity gets the better of her when the emperor's infant children fall gravely ill. Maomao quickly unravels the mystery behind their affliction, but her attempt to remain anonymous is foiled by the perceptive eunuch Jinshi, who recognizes her remarkable talent. As a result, Maomao is promoted to lady-in-waiting for the emperor's favorite concubine, Gyokuyou, and her expertise in pharmaceuticals proves invaluable in treating the numerous ailments plaguing the imperial court. With her skills in high demand, Maomao must navigate the treacherous world of court politics while keeping her true identity and abilities hidden.

As the new semester dawns, Koyomi Araragi and his eclectic group of friends are faced with the daunting prospect of graduation looming on the horizon. With his future uncertain, Koyomi must navigate the complexities of relationships and friendships, all while dealing with the supernatural entities that seem to orbit his life. Meanwhile, a mysterious tiger apparition appears, targeting Tsubasa Hanekawa, the group's genius and Koyomi's confidante. As Hanekawa finds herself in a precarious situation, she must rely on her wits and resourcefulness to survive.

In a small, enigmatic photo studio, two friends, Cheng Xiaoshi and Lu Guang, possess a unique gift - the ability to physically enter photographs. As their clients bring in treasured snapshots, the duo uses their extraordinary powers to delve into the captured moments, unraveling the secrets hidden within. By assuming the perspective of the photographer, they relive the events surrounding the image, striving to decipher the mysteries and fulfill the client's desires. However, this extraordinary ability comes with a profound risk. Every misstep can have far-reaching consequences, altering the future of the photographer and potentially reshaping the course of countless lives. As they become increasingly entangled in the stories they're asked to unravel, the lines between their own emotions and the events they're trying to alter begin to blur. It's a delicate balancing act, requiring unwavering focus and self-control to accomplish their mission without succumbing to the weight of their own feelings.

In a world where the unknown is often feared and misunderstood, a peculiar phenomenon known as the Mushi has come to be. These enigmatic beings, despite their strange nature, harbor no ill will towards humanity. However, their existence can have unintended and far-reaching consequences when exploited by humans. As a skilled Mushishi, Ginko embarks on a journey to facilitate harmony between the visible world and the mysterious Mushi. Along the way, Ginko encounters individuals with extraordinary abilities, some cursed by circumstance and others in delicate balance with the Mushi. As he delves deeper into the world of these strange beings, he is forced to confront the question of whether humanity, regardless of its talents or tribulations, is equipped to handle the responsibility that comes with the unseen. Moreover, Ginko must grapple with the ethics of intervening in the intricate relationships between the Mushi and mankind, weighing the consequences of his actions.

In a world teeming with life, there exist entities that defy categorization. Known as Mushi, these enigmatic beings lack purpose or motivation, existing solely to be. They can manifest in countless forms, from the natural world to the most abstract phenomena. Yet, despite their ubiquity, humans remain largely oblivious to their presence. Enter Ginko, a renowned Mushishi, who has dedicated his life to uncovering the mysteries of these elusive entities. With an insatiable curiosity, Ginko embarks on a journey to investigate rumors and occurrences that may be connected to the Mushi. His quest is driven by a deeper longing to understand the place of these Mushi in the grand tapestry of life. As Ginko delves deeper into the unknown, he may stumble upon answers that could redefine humanity's understanding of existence itself. Will his tireless pursuit of truth ultimately reveal the secrets of the Mushi, or will the mysteries of these ancient beings remain forever shrouded in mystery?

In a small town, a peculiar individual named Hiroshi Odokawa navigates his daily routine as a taxi driver. His straightforward nature and eccentricities make him a magnet for an eclectic group of passengers, including the aimless Taichi Kabasawa, the enigmatic nurse Miho Shirakawa, the struggling comedy duo Homo Sapiens, and Dobu, a notorious delinquent. However, Odokawa's ordinary life takes an unexpected turn when the police investigation into a missing girl's disappearance suddenly centers around him. As the yakuza and a pair of corrupt cops close in, Odokawa finds himself entangled in a complex web of secrets and lies.

In the depths of the earth lies the enigmatic Abyss, a vast chasm teeming with ancient secrets and mysterious creatures. For centuries, brave Divers have ventured into its unknown regions, driven by an insatiable curiosity about the Abyss's origins and the secrets it holds. Among them are the legendary White Whistles, celebrated heroes who have pushed the boundaries of human exploration. Riko, the daughter of the legendary Lyza the Annihilator, is determined to follow in her mother's footsteps and uncover the secrets of the Abyss. As a novice Red Whistle, she's only allowed to explore the upper layers, but her chance encounter with a mysterious robot boy, Reg, sets her on a journey to uncover the truth about his creation and the Abyss's darkest depths. Reg, however, has no memory of his past, and together they embark on a perilous quest to recover his memories and reach the bottom of the Abyss. As they delve deeper into the unknown, they'll encounter treacherous landscapes, ancient ruins, and hidden dangers. But the harsh reality of the Abyss is only beginning to reveal itself, and Riko and Reg must confront the unforgiving environment and the secrets it holds if they hope to uncover the truth about Reg's past and the mysteries of the Abyss.

In the depths of the Abyss, Riko has emerged victorious from the trials of Idofront, now wielding the coveted White Whistle. With her newfound access, she sets out to conquer the sixth layer, the enigmatic Capital of the Unreturned, alongside her trusted companions Reg and Nanachi. As they delve into the uncharted territory, they stumble upon the remnants of the mythical Golden City, hidden within the ruins of a forgotten civilization. As they navigate the unforgiving landscape, the trio faces off against formidable creatures and treacherous terrain, their resolve tested by every step. Their journey ultimately leads them to a peculiar village, inhabited by the eerie "hollows." Despite the ominous atmosphere that surrounds them, Riko and her companions press on, driven by a burning curiosity to unravel the secrets of the settlement and the forgotten legacies of those who dared to venture into the Abyss's darkest depths.

In a quiet autumn evening, a lonely college student stumbles upon a peculiar ramen stand behind the Shimogamo Shrine, where he encounters a god of matrimony with an otherworldly appearance. This chance meeting prompts the student to reflect on his past two years, spent attempting to break up couples with his enigmatic friend Ozu, who seems determined to make his life miserable. As he contemplates the missed opportunities and unrequited feelings, he is suddenly transported back to the beginning of his college journey, given a second chance to rewrite his story. As he navigates the ups and downs of campus life, the student finds himself hurtling through alternate realities, each one offering a new chance to make different choices and forge new connections. He becomes fixated on winning the heart of the introverted but kind Akashi, yet his failures only serve as a catalyst for further self-reflection and growth. Along the way, he encounters a cast of eccentric characters, each with their own secrets and motivations, adding to the surreal and dreamlike quality of his adventures. Through his journey, the student comes to realize that the path to true connection and fulfillment is not a straightforward one, but rather a complex web of choices and consequences. With each new reality, he is forced to confront his own desires, fears, and limitations, ultimately leading him on a path of self-discovery and growth.