Shinpei, a husband with a calm personality, had a younger brother named Shin-go who was the complete opposite in appearance and temperament. His job was unstable, he had no money, and often came to borrow from Shinpei. One day, Lily, who was sent to deliver money to Shin-go's house instead of Shinpei, was led into a dirty room and suddenly pushed down. Unable to move under the large-framed Shin-go, Lily was raped from behind. However, Lily, penetrated from behind by his robust penis, experienced pleasure she had never felt with her husband…
