High school student Natsuki Tokita cherished his lover, Ai Momose, above all else. But one day, Ai is stabbed to death by Nozomi Niromiya—a girl who once attended the same juvenile detention center as Natsuki. Struck speechless by the sudden tragedy, Natsuki hears Nozomi call his name. Yet her voice feels somehow nostalgic... and gentle!? From that day on, Ai and Nozomi's personalities begin swapping back and forth within Nozomi's body. Caught between his beloved lover and the murderer he harbors deep resentment toward—can Natsuki continue to love, even so? (Source: Kadokawa, translated)