On his way to a convenience store, Kazuya Shiina tries to defend two young girls from an armed assailant, only to end up getting stabbed himself and dying on the spot. This good deed allows him to be reborn with all his memories in another world as Cain von Silford, the third son of a margrave. When Cain turns five, a baptismal ceremony in the church grants him an audience to the seven gods who preside over the world. Not only do the gods fill him in on the circumstances of his reincarnation, but they also give Cain their respective divine protections—allowing him to use cheat-like abilities in swordsmanship, magic, and many other aspects. With these blessings, Cain sets out to live a fulfilling life that he deems a dream come true. However, it soon becomes clear that the gods have more plans for him than just a haphazard bestowal of overwhelming power.

Tetsuo Tosu never expected his daughter, Reika, to be a victim of domestic violence. Suspecting that her yakuza boyfriend, Nobuto Matori, is the perpetrator, Tetsuo decides to investigate him and his associates. But as he searches for evidence at Reika's apartment, the father learns that his daughter is not the first victim and that a worse fate awaits her. When he is discovered by Nobuto, Tetsuo ends up killing him in the ensuing fight. Assisted by his wife, Tetsuo hides the body in fear of retaliation from the yakuza. To add to the misfortune of the Tosu family, Nobuto happens to be the son of the mafia's head. Considered to be prime suspects behind Nobuto's disappearance, Tetsuo and his wife will have to deploy all their ingenuity to protect their daughter from the yakuza and their ruthless investigation.

It adapts the story from volume 12 (chapter 98 onwards) of the manga series "Demon Slayer: Kimetsu no Yaiba" . The story takes place in a new setting - Tanjiro arrives at the "Swordsmith Village." After the death of Upper Moon Six and Daki, a vacancy appears among the upper moons, and Muzan Kibutsuji summons the remaining upper moons to the Infinity Castle. Muzan is furious about the vacancy and believes that the upper moons should do everything in their power to find the "Blue Spider Lily" and eliminate the Demon Slayer Corps. As a result, Upper Moon Four, Hantengu, and Upper Moon Five, Gyokko, are dispatched to carry out the mission. Meanwhile, Tanjiro, who has been recovering from his injuries at the Butterfly Estate for two months, learns that Kozo Kanamori, the swordsmith, has refused to make him a new sword. Following the advice of the Hashira, Shinobu Kocho, Suma Nakahara, and Kiyo Terauchi, Tanjiro travels to the Swordsmith Village to conUpon arrival, he encounters the Love Hashira, Mitsuri Kanroji, and the Mist Hashira, Muichiro Tokito, as well as Genya Shinazugawa. Tanjiro and his companions are about to embark on a new battle. The opening theme song "Ketsui no Hikari" is performed by MAN WITH A MISSION and milet. The lyrics and composition are by Jean-Ken Johnny, with arrangement by MAN WITH A MISSION and cooperation by Chisato Ichinose. The ending theme song "Koikogare" is also performed by MAN WITH A MISSION and milet.

Centuries ago, mankind abandoned planet Earth after the Vice, a race of mechanical aliens, drove them from their home into a life adrift in space. Now resigned to starships forged of pieces of Earth’s shattered moon, the final hope for humanity lies in the hands of Actresses, young women born with the ability to wield the only weapons that can harm the Vice: Alice Gears, mechanical suits that can finally turn the tide against the alien incursion.