The world is suffering from a quiet erosion of reality. People are mourning strangers they never met and remembering lives that never happened. Sakurai Yuuto, a time-traveler, discovers that these "glitches" are the result of a cosmic erasure. Alongside Deneb, the last remaining spirit of a forgotten existence, Yuuto hunts for the source of this decay. Meanwhile, a man named Ryotaro Nogami is haunted by vivid dreams of a life and a place he has no record of visiting. The investigation reveals a terrifying truth: the world is purging the existence of Eiji Hino. This is not merely a paradox, but the fallout of "Project Existence", an ancient attempt to quantify human being, and "Residual World Memory", a phenomenon where the world preserves a person's emotional pain even after their physical history is erased. As Yuuto draws closer to the truth, he realizes that he is not just the investigator, he is the next victim. He is being systematically erased from reality; his face is vanishing from photographs and his name is disappearing from archives. Deneb is no longer just a companion, but Yuuto's only remaining "anchor" to existence. The trail leads Yuuto to Fuuto, the City of Wind, where intersecting legacies collide. Yuuto discovers that to stop the erasure and restore the forgotten, a permanent sacrifice is required. He must choose: fight to reclaim a future that has already collapsed, or embrace becoming a "Vestige" vanishing entirely into the past to ensure that the names erased from history are never truly lost to time. Prequel #1 to the OOO Saga series "Where I Learned to Stay" Disclaimer⚠️ The above characters are from Kamen Rider! and Kamen Rider belongs to Toei, not me. But all the storylines are purely from my ideas. This story is the Prequel 01 timeline of the OOO saga for the next 3 stories. AND THIS STORY IS ABOUT DEEP PLATONIC FRIENDSHIP!! Start: August 3, 2026 End: September 16, 2026

Ankh has always viewed human emotions, laughter, tears, and the fragility of connections as illogical puzzles. However, a sudden accident leaves Ankh trapped in a liminal space between life and death, invisible to the world, until he encounters Eiji Hino. Eiji is an anomaly: a warm, selfless youth who can see Ankh and welcomes him into a world of simple joys and genuine bonds. As Ankh finds himself drawn to Eiji's light, he discovers that "home" isn't necessarily a place, but a person. But when time begins to threaten the only connection he has left, Ankh must face the devastating reality of how to move forward when your only sanctuary begins to fade. Disclaimer⚠️ The above characters are from Kamen Rider! and Kamen Rider belongs to Toei, not me. But all the storylines are purely from my ideas. This story is the main timeline of the OOO saga for the next 4 stories. AND THIS STORY IS ABOUT DEEP PLATONIC FRIENDSHIP!! Start: June 29, 2026 End: August 3, 2026