TV-Series
Description
Ryoudou Yukiatsu, heir to a shogunate vassal, vanished at age fifteen and reappeared one year later, subjectively experiencing only an instant. Transported to an "Other World," he remains the sole known returnee, fundamentally altered by the experience. Ordinary human experiences like food and environments now bring him no satisfaction, fostering perpetual alienation.

After returning, Yukiatsu exhibited reckless behavior: training as a samurai, becoming a ronin, and working as a bodyguard. His exceptional combat skills fueled a pattern of instigating fights, manipulating gambling outcomes, and sexually harassing a woman named Oshino. This culminated fifteen years before the main events in a confrontation with his friend Kumoshichi, Oshino's partner. Yukiatsu killed Kumoshichi in self-defense, an act so traumatic he unconsciously suppressed the memory. This repression later manifested a Yoi entity resembling Kumoshichi. He became a drifter, spending time in vagrant camps where multiple escapes and recaptures resulted in distinctive tattoos on his arm and shoulder.

His prolonged absence—spanning twenty-five years—created unresolved familial tensions, particularly his refusal to assume household leadership against his mother's wishes. The Other World granted him the Ayagami power: the ability to discern and extract the true names of beings or objects, transforming them into weapons. This ability led to his recruitment by the Bansha Aratamesho, a covert group combating supernatural Yoi threats.

Within this organization, Yukiatsu operated alongside colleagues Ogasawara Hōzaburō, Edo Genbatsu, Saizō, and Abi. His status as an eternal outsider fostered deep empathy for marginalized individuals and foreigners. Key developments included confronting his repressed past regarding Kumoshichi's death, which required fusing with a serpent Yoi manifestation linked to Kumoshichi to restore balance. Later, temporal anomalies resulted in multiple versions of himself appearing simultaneously, forcing a reckoning with his fractured identity. This culminated in his decisive rejection of permanently rejoining his biological family. Concurrently, he faced a confrontation with his ancestral sword, transformed into a hostile Yoi entity, defeating it by again merging his consciousness with Kumoshichi's lingering essence.

The OVA narrative revealed a stable time loop: Yukiatsu, alongside Atl and other Ayashi members, played an instrumental role in guiding his younger self back from the Other World decades earlier. This recontextualized his entire journey as predestined intervention, intertwining his fate with the very events that originally shaped his alienation and power.