Seinen manga, originally aimed at young men over 18, has become more popular among a broader audience due to its exploration of mature themes. This genre can be more complex and nuanced than other manga genres while being just as emotional. Seinen manga covers various topics, such as war, politics, sports, sci-fi, fantasy, history, love, and humor, and can be expressed in multiple artistic styles.
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It can be frustrating to have to wait for new chapters in a series, so the sense of relief that comes when a series finally concludes is hard to beat. Luckily, there have been a few long-runningseries that recently reached their conclusionnow fans can binge-read the entire story without any interruption. Here are some seinen manga to read now they are complete.
10BNA
BNAis an official manga written by Asano and serialized in Tonari no Young Jump. The manga was compiled into a single volume released on July 03, 2025. The story occurs in Anima City, a place created as an independent haven for all species of Beastmen to coexist.
High school student Michiru discovers she is the first human to become a Beastman with shapeshifting powers. She seeks refuge in Anima City after running away from human anti-beastmen advocates and teams up with Shirou Ogami, apowerful wolf Beastman. Together, they seek to uncover the truth behind her “Beastmanitis” and the conspiracies that threaten to divide Anima City.
9Valhallian The Black Iron
Matsubara Toshimitsu’sValhallian the Black Ironis an enthralling manga series spanning six volumes and fifty-five chapters, serialized in Young Jump from June 02, 2025, to August 02, 2025. Following the journey of Souma Tetsujirou, a Kamakura samurai who survived the Mongolian invasion, he unexpectedly finds himself in Valhalla after being transported there by a girl named Hrist.
To return to the land of the living, Tetsujirou must battle “dead warriors” from various historical eras in the Shura Hall of Norse mythology. This manga is athrilling tale of samurai drama, where defeating enemies takes precedence over all, even if it means sacrificing one’s own life.
8Ottoman
Ottomanis a manga series by Shinnosuke Kanazawa published in Weekly Young Jump. With five volumes and forty-seven chapters released from July 11, 2025, to July 31, 2025, the story follows Souya, an unfulfilled office worker who dreams of becoming a manga artist.
After a sudden accident, he becomes parasitized by an alien, transforming into an “Ottoman” to protect his beloved wife, Yuuka, from the alien threat. Thissci-fi action mangashowcases the power of love and protection through the story of a man who fights as a superpowered “husband-man” to defend his love and the world.
7Gift±
Gift±is a manga series that explores the murky world of organized crime and the increasing demand for high-quality organ transplants in Japan. Tamaki Suzuhara, a beautiful and mysterious high school girl, sets out on a dangerous journey to find someone important to her who has vanished.
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As she becomes entangled in an illegal organ trafficking network, Tamaki must grapple with difficult moral choices in a brutal and violent world. Will Tamaki succeed in her quest and find what she is searching for? With twenty-six volumes published between July 14, 2025, and June 09, 2025, this gripping mystery manga will keep readers on the edge of their seats.
6Busu ni Hanataba wo (Bouquet for an Ugly Girl)
Busu ni Hanataba wo, written and illustrated by Roku Sakura, is a manga series completed in 2022. It was published in Young Ace by Kadokawa Shoten with twelve volumes and seventy-four chapters, and in November 2022, it was announced that the series would receive an anime adaptation.
Thiscomedy and romance mangafollows the story of Hana Tabata, who views herself as “ugly” despite her name meaning “flower.” She cares for the flowers in her classroom when no one is present. One day, the popular and kind Yousuke Ueno sees her tending to the flowers, and they become unlikely friends. Tabata struggles to comprehend why Ueno would want to associate with her. Can Ueno prove to her that appearance isn’t everything?
5Yukionna To Kani Wo Kuu (Eating crab with a Yuki-onna)
Yukionna to Kani wo Kuuis a drama manga series with nine volumes and seventy-eight chapters. It was serialized in Young Magazine (Weekly) from January 2019 to September 2022 and adapted into a live-action TV series in November 2022.
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On a hot summer day, a man decides to end his life but fails to follow through. He watches a TV program about seafood and realizes that he has never eaten crab. He plans to travel to Hokkaido to try it, but he needs money. He decides to rob a rich housewife but is surprised when she offers him her money and body instead, setting the pace for rich drama series.
4Himawari-san
Himawari-sanis a delightful manga series by Manami Sugano, which ran for thirteen volumes in Comic Alive magazine from August 2009 to July 2022. It’s aheartwarming slice-of-life storythat revolves around Matsuri Kazamatsuri, a high school student who falls in love with the owner of Sunflower Bookery.
The manga is known for its relatable characters, charming setting, and well-crafted plot. It’s a touching exploration of the gentle and heartwarming relationship between a high school student and a bookstore owner. The story arcs are emotionally satisfying, and the writing is funny, touching, and cute without relying too heavily on tropes.
3Interviews With Monster Girls
Interviews with Monster Girlswas created by Petos and published by Kodansha. It consists of eleven volumes and was first serialized in Young Magazine on Jun 27, 2025, before moving to Monthly Young Magazine in 2021 and ending in December 2022.
Set in a world where demi-humans, or “demis,” are now a part of human society, the story follows a high school biology teacher who teaches three demis, hoping to gain a deeper understanding of them. The manga has also been adapted into an anime television series by A-1 Pictures.
2Asobi Asobase
Asobi Asobaseis a manga series by Rin Suzukawa that began in June 2015 on Hakusensha’s Young Animal Densi website. It was later published in Young Animal and finished in November 2022 with fifteen volumes, with the anime adaptation airing in Japan in 2018.
The story follows Hanako Honda, Olivia, and Kasumi Nomura, the only members of the not officially recognized Pastimers Club at theirall-girls middle school. The girls develop various “pastimes” and games to play, resulting in a surreal and hilarious gag manga.
1Kaguya-sama: Love is War
Kaguya-sama: Love is Waris a romantic comedy manga series created by Aka Akasaka, which spans twenty-eight tankōbon volumes. It has been incredibly successful, with over twenty-two million copies in circulation as of December 2022, and even won the 65th Shogakukan Manga Award in the general category in 2020.
The series follows Kaguya Shinomiya, the vice president of the prestigious Shuchiin Academy, and Miyuki Shirogane, the student council president. Despite being seen as the perfect couple by their classmates, they have developed feelings for each other but are too prideful to confess. The manga follows their daily attempts to make the other confess their love, resulting in a hilarious love battle.
