Struggling to adapt to life with a new mother and sister after her father's remarriage, Mizuki meets a blue-eyed man playing guitar on the street in Shibuya and is powerfully drawn to him. How far will she go to see him again?

After a brush with death, young Hotaru meets Mizuki for the first time in a dream. The next day, Hotaru wanders into an abandoned mansion and comes face-to-face with the girl she met in her dream...