The ghost isn't the supernatural element that matters. Kenji is trapped between two women who love him, both of them real in different ways, and the show knows the cruelest part of that isn't choosing but admitting what you already chose long ago. Time moves differently when you're haunted by someone who was never supposed to come back.
Kenji lives in an empty house with Yuki, his sister-in-law, whose quiet affection for him hangs unspoken in every room. Their isolated routine shatters when a translucent figure materializes in his bedroom: Hiyori, a childhood friend neither of them expected to see again, appearing as a ghost with no memory of how she arrived. The reunion should feel like closure, but tension fractures the moment when Kenji and Hiyori's bond reignites with an intimacy that leaves Yuki watching from the margins. Her carefully buried feelings surface alongside fragmented memories of their shared past, particularly a childhood exchange involving a pale blue toy ring and a yoyo that neither fully understands anymore. Yuki must confront what she's been avoiding: whether her connection to Kenji belongs to the present or remains locked in the past, and what Hiyori's supernatural return truly means for all three of them. This story weaves romance, loss, and unresolved history into something that questions whether some bonds should be rekindled or finally laid to rest.