While staying with his brother and sister-in-law, he secretly falls for the always-kind Aya. One day his brother leaves on a business trip, and a sudden torrential downpour keeps the rest of the family away. Alone in the large house, he cannot stop staring at Aya’s soaked hair, rain dripping from her clothes, and full breasts visible through the wet fabric. His reason snaps, and he gives in to years of desire, devouring her drenched body and having sex with her again and again.