Set in an alternative world of Bungo Stray Dogs, this "what-if" story imagines if Atsushi Nakajima was in the Port Mafia and Ryūnosuke Akutagawa was in the Armed Detective Agency, instead of vice-versa. The story follows Ryūnosuke Akutagawa, who vows revenge on a man dressed in black in order to rescue his sister. However, as he is about to starve to death, a man from the Armed Detective Agency appears.

Vampires have lived and coexisted with humans since medieval Romania. They set their sights on Nobara High School, a private school in Ibaraki Prefecture, as a place of prosperity. One day, Goro, a second-year high school student who likes women, is attacked by someone. The next day, he went to school dressed as a woman and became gay. His classmate Kyohei Kohinata predicts that if he is bitten by a vampire, he will become homosexual.

The origin story of Nozomu Otani, a young man who inherits the powers of Kamen Rider Chimera from his friend Ryu Mukai. This special serves as a prequel to the events of Kamen Rider Revice: Battle Familia.

A delinquent teenager is killed in a car accident, and is resurrected as an investigator of the supernatural.

Yusuke Urameshi, revived as a spirit world detective, defeats the evil monsters that appear one after another with his reliable friends Kuwabara, Kurama, and Hiei in order to protect peace between the human world and the spirit world. In front of them, a formidable enemy stands in their way... The battles gradually become more intense as the stages change from the human world to the spirit world to the demon world, and what lies ahead as the story deepens...

Keiwa and Sara are transported to the World of Shinobi where they assist Rentaro and his allies in fighting the powerful Amakusa Shiro Tokisada.