Sensitive older sister who has incontinence with her younger brother's electric massager secretly gets addicted to the pleasure. Sexual processing play so as not to mischief younger brothers who are crazy! !! "My sister was sick again (laughs) It looks like a shrimp." "Sorry! Chinch in revenge ... An Mita - Miharu Kawada (An Mita)

The movie depicts a sensitive and taboo relationship between an older sister and her younger brother, where the sister becomes addicted to the pleasure of using her brother's electric massager. As they engage in sexual processing play, the boundaries between them begin to blur, leading to a complex exploration of power dynamics, sibling rivalry, and forbidden desires. The story navigates the darker aspects of human nature, revealing the intricate dance between shame, guilt, and arousal that arises from their clandestine interactions.