Miyuki Amou, the gentle and hospitable caretaker of Kazahana Inn, prioritizes guest comfort. She is a widow; her late husband Heizou was an expert in Shibari techniques. His death from illness, before completing her training, left her battling profound grief and a deep emotional attachment to his memory. This unresolved connection fueled increasingly desperate and self-destructive behavior.

Her path shifts with the arrival of Seiichi Itoh at the inn, though neither initially grasps the reason for his presence. Through their subsequent interactions involving Shibari practices, Miyuki engages with the methods tied to her husband. This engagement sparks introspection about her relationship with Heizou, forcing her to confront the nature of her attachment.

Miyuki's development culminates in achieving clarity about her feelings. She realizes her devotion centered not on Heizou himself, but on his specialized techniques. This recognition allows her to resolve her lingering fixation and move beyond the self-destructive patterns born from her grief.