Housewife Midori is on her way home after dropping off her child when she reunites with her old school friend, Natsuki. Struggling in her relationship with her husband and feeling sexually frustrated due to their lack of intimacy, Midori confides in Natsuki about her troubles. Introduced by Natsuki, she gets drawn into a dangerous part-time job involving forced deep throat and having her pussy stimulated with extremely thick toys. This bizarre experience brings unexpected changes into Midori's everyday life.