Shirodaira Kyou

The manga is based on Kyo Shirodaira's 2016 novel of the same name, and it is a youth mystery story set in a town where sumo wrestling remains supreme. \[ANN]

The story takes place in the city of Tokui, which has a legend of two monsters. Yūko Tengai transfers to the town's high school out of season in order to look for clues to clear her older brother of suspicion in a 10-year-old murder case. She teams up with her classmate Masaki Maki, who was in a coma for eight years, and her brother, who uses a robot to communicate to them from his zashikirō (Edo period-style room for confining criminals). But Yūko has a true form…

Meet the cute, smug, cane-wielding 17-year-old Iwanaga Kotoko as she (very) aggressively tries to woo the older Sakuragawa Kurou and act as a mediator/problem-solver for the supernatural world. But why is she so fascinated with Sakuragawa Kurou? The truth is...Alternative English Translation: INKR

One day, a princess was stuffed into a barrel and washed ashore an island. One day, a young girl was unexpectedly killed, the culprit yet unidentified. Thus, one day, a battle wrapped in revenge and magic that transcends time and space had begun.

The point of view begins with Hakaze, a witch who ended up on a deserted island. Changing point of views, we now look at Yoshino and Mahiro. Yoshino and Mahiro were best friends, but one day Mahiro suddenly disappeared. Yoshino assumed that he found a clue to whoever murdered his family. Despite the close bond they had, Yoshino has no idea where Mahiro is. However, one day when Yoshino was putting flowers on Mahiros' family's grave, a woman questions Yoshino about Mahiro at gun point. According to the woman, Mahiro got involved with some serious issues that will inevitably put the human race in a catastrophic situation, and the Japanese government is desperately looking for Mahiro. Apparently some sort of "magic" is involved. What happened to Mahiro? And who is this Hakaze girl? What does Hakaze have to do with this?

Thousands of years ago, Vampire King Akabara "Red Rose" Strauss lost both his kingdom and his queen. Since humans were unable to kill the queen, they sealed her away, erecting thousands of fake seals so that the king would never find her true location. Despite being pursued by relentless dhampires, Akabara continues to search for his queen to this day… Akabara's quest takes a sinister turn when an entity called the Black Swan appears. The Black Swan inhabits the body of a young human girl every 50 years, giving her the power to destroy the Vampire King and his queen. With each incarnation the Black Swan grows stronger–will the 49th Black Swan mean the end of Akabara?

This is a spin off story that occurs some years before Spiral. The main character is Imari, who is in love with the kid who wants to be a detective, and that he quits school running after Kiyotaka, and it seems he's dating a murderer without knowing it…? But how is it all connected to the blade children?

World-class detective Kiyotaka Narumi’s last words prior to his sudden disappearance continue to haunt his younger brother, Ayumu. The cheeky 10th-grader becomes equally embroiled in the mystery of the doomed “Blade Children” when he is mistakenly named the prime suspect in a murder at his school. Led by Ayumu’s sister-in-law, Kiyotaka’s wife and fellow detective, Madoka, the investigation into the murder gives Ayumu a chance to clear his name. But in doing so, he not only uncovers ties to the Blade Children but also more questions than answers about who and what they are.