Yui lives a quiet, ordinary life with her husband, but she harbors a secret she dares not reveal to anyone: she is a true masochistic woman with an insatiable craving for bondage. To satisfy her hidden desires, she secretly ties herself up with jute rope and posts the photos online—an obsessive compulsion she can no longer control. Overcome by her urges while her husband is away on a business trip, Yui reaches out to a professional dominatrix to fulfill her long-suppressed fantasies. Finally surrendering to her deepest yearning, she whispers those fateful words: "Please tie me up."