Juri Makina is a high school student whose life at school is defined by a cheerful, smiling exterior and a busy social circle of friends. This outgoing demeanor, however, masks a private and years-long internal struggle. She is afflicted by recurring, distressing nightmares that occur every night, each one the same vivid scenario: a futuristic world where a melody plays continuously as a robot girl stands before a ruined tower. Although specialist doctors helped her initially manage the condition, the relentless dreams caused deep underlying stress and pain that remained completely hidden from her classmates.

The dream's content and its melody became a profoundly isolating part of her existence. This changed when a schoolmate with a unique musical ability heard the melody as her phone's ringtone and later inadvertently played it. That individual then experienced an identical dream, creating a unique connection between them. For the first time, someone else could genuinely understand Juri's private pain, providing her significant relief from the years of stress and marking a turning point in her emotional state.

This connection enabled a journey toward self-discovery and emotional healing. Juri began to confront a hidden pain from her past, which she had kept secret from everyone at school. This part of her history had also impacted her relationship with her father and her general approach to forming relationships with others. By opening up about her past and her dreams to someone who understood, she started to process these emotions and move toward a path of healing.