Koizumi works as a nurse attending to Risa Hoshino, an elderly patient hospitalized after a near-death experience. Risa develops telekinetic abilities and fixates on a fellow patient she believes embodies the reincarnation of a past lover. Her delusions originate from a tragic romantic incident in her youth, where rejecting a man’s confession allegedly caused his suicide. Koizumi observes Risa’s emotional turmoil as events unfold, including the revelation that the man survived—his account conflicting with Risa’s guilt-laden memories. The nurse’s perspective frames the tension between Risa’s profound remorse and the ordinary truths of the past, anchoring the narrative’s themes of distorted memory, regret, and unexplained phenomena within the hospital’s clinical backdrop.