It was a familiar scene. Looking into the house, he saw his mother, Chisaki, being caressed by Tsukagoshi, a dance instructor. His mother was sucking on his penis, wet with love juice... His mother was the pride of his mother, who had raised him alone after his father passed away, but his son, Hiroshi, could not bring himself to like Tsukagoshi. In front of Hiroshi, she had a secret side to her, and would use vulgar language to mock his mother. When Chisaki rejected Tsukagoshi's marriage proposal after hearing Hiroshi's plea not to be deceived, Tsukagoshi attacked Chisaki by force. Hiroshi stood up to Tsukagoshi, but...