When it comes to anime, there are countless series aimed at a teenage audience, particularly some of the best introductory shōnen series like My Hero Academia, Hunter x Hunter, and Demon Slayer, as well as classic shōjo series such as Sailor Moon and Fruits Basket.
However, that does not mean adults cannot enjoy these titles, and there are numerous anime designed to appeal to a broad demographic, such as Spy x Family— a rare anime that seamlessly blends genres to captivate viewers of various age groups.
With that in mind, there are also anime specifically crafted for a more mature audience, even when they feature child or teenage protagonists, as seen in Attack on Titan and Erased.
Additionally, some psychological thrillers, like Monster and Death Parade, provide a more grounded, thought-provoking experience.
There are also high-genre series such as Castlevania: Nocturne, Zom 100: Bucket List of the Dead, and Cowboy Bebop.
Beyond action and thriller genres, romance anime featuring adult characters in settings outside of high school also cater to older audiences. Here are ten anime that serve as a reminder that anime is not just for children.
7. Attack on Titan
By Hajime Isayama
Attack on Titan is a globally renowned manga and anime franchise created by Hajime Isayama. The story is set in a world where humanity resides within walled cities, constantly under threat from giant humanoid beings known as Titans.
The series follows Eren Yeager and his companions as they strive to uncover the truth behind the Titans and the world they inhabit. First serialized in 2009, the franchise has since expanded into anime adaptations, films, video games, novels, and live-action productions.
While Attack on Titan may initially appear to follow a conventional shōnen setup, the first episode immediately establishes a darker tone through its tragic death toll.
As the series progresses, it goes beyond mere action and violence, delving into mature themes such as genocide, political corruption, and propaganda.
Between its intense depiction of war and unsettling horror elements, it is no surprise that Attack on Titan has resonated with an older audience.
This is far from a children’s anime, as it has been rated for viewers aged 15 and up, with IMDb explicitly listing it as Rated R due to its terrifying imagery and unflinching portrayal of grotesque death scenes.
6. Erased
By Kei Sanbe
A series featuring child characters but intended for mature audiences is Erased. The protagonist is technically in his twenties, but he is unexpectedly sent back in time to his childhood, where he must prevent the murder of a former classmate while navigating life as a child once more.
In addition to tackling issues such as abuse and murder, Erased stands out as one of the most gripping thriller anime.
While there are differences between the final volume of the Erased manga and the anime adaptation, both versions present masterfully crafted mysteries, making them worth experiencing in their own right.
5. Monster
By Naoki Urasawa
Another remarkable crime thriller—widely regarded as one of anime’s greatest psychological thrillers—is Monster. This must-watch and must-read series follows Dr. Tenma, a skilled surgeon who becomes entangled in a complex mystery while hunting down a ruthless serial killer.
Unlike many anime that incorporate fantastical or genre-based elements, Monster is deeply rooted in realism, which only enhances the chilling nature of its antagonist’s crimes. Set in 1980s Germany, the story is also heavily influenced by the political landscape of the time, adding further depth to its narrative.
4. Cowboy Bebop
By Shinichirō Watanabe
Cowboy Bebop is not only one of the greatest sci-fi anime of all time, but it is also widely regarded as one of the best anime ever created—even decades after its initial release.
The story follows the eclectic crew of the Bebop, a weathered spaceship traversing the galaxy in pursuit of bounties. Spike, Jet, Faye, Ed, and their canine companion Ein form a compelling ensemble cast that elevates the series.
Blending elements of film noir with science fiction, Cowboy Bebop is a perfect choice for fans of movies like Blade Runner. The show’s strong narrative, engaging character dynamics, and stylized aesthetic have solidified its legendary status.
As entertaining as it is, Cowboy Bebop is strictly for mature audiences aged 16 and older. Even during its time of release, the anime pushed boundaries with its depictions of violence, occasional sexual themes, nudity, and colorful language—making it clear that it was never meant for young children.
3. Yuri on Ice
By Sayo Yamamoto
Shifting focus to romance anime featuring adult characters, one of the most groundbreaking and beloved titles is Yuri on Ice. This series stands out not only as a revolutionary romance anime but also as a compelling sports anime.
While the romantic tension between figure skater Yuri and his coach Victor is a major draw, the series is also a deeply personal story about a grown man striving to achieve his dreams in competitive figure skating before aging out of the sport.
Yuri’s aspirations are not just idle dreams—his dedication and hard work result in breathtaking performances that mesmerize both audiences and judges alike.
2. A Sign of Affection
By Suu Morishita
One of the standout shōjo romance anime of 2024 is A Sign of Affection. While many romance anime take place in high school, this series captures the same exhilarating emotions of first love but within a college setting.
The story follows Yuki, a young woman with a hearing impairment, as she meets and forms a romantic connection with her classmate Itsumoi. Like the best shōjo anime, A Sign of Affection pairs heartfelt storytelling with stunning visuals and animation, perfectly complementing the emotions of its central couple.
1. Wotakoi: Love Is Hard for Otaku
By Fujita
While A Sign of Affection represents a newer take on romance anime, Wotakoi: Love Is Hard for Otaku has been a fan favorite since its manga debut in 2014. This workplace romance follows Narumi, a young woman who struggles to find love due to her otaku interests.
However, when her co-worker Hirotaka—who shares her passion for nerdy hobbies—suggests they date each other, they embark on a unique and endearing relationship.
Alongside Narumi and Hirotaka, their friends navigate their own relationships and otaku lifestyles. Wotakoi is a charming romantic comedy that embraces its characters’ geeky passions, delivering a relatable message to any adult anime fan who loves indulging in their hobbies.
