Yamanaka Mariko, 29 years old. On the verge of turning thirty, she is deeply immersed in her second sexual relationship with her father. She has an outrageous fetish—wearing children's clothing and screaming "Tousan!" as she chases pleasure. Living alone with her father in a condominium, her abnormal desires draw the attention of even more twisted men. This film portrays her daily life and bizarre romantic entanglements.