In episode three, Takumi slips into a restless sleep that draws him into fragmented memories of the hospital’s earlier years, where past events still resonate through its rooms. Amano Aki assists by cross-referencing old documents with the details he describes, gradually assembling a clearer picture of the institution’s concealed history. Their combined efforts surface a key connection that deepens the mystery and prompts further questions about the site’s former operations. As the investigation advances, the boundary between Takumi’s perceptions and the present begins to shift noticeably.