Sorrowful mother incest perverted daydream

Kiyoshi, the only son, returns home for the first time in five years, unable to adapt to the city life he had dreamed of, and feels uncomfortable with the atmosphere at home. Mother Chizuko's strange behavior. Father-in-law's cold gaze. Everything was rejecting Kiyoshi. Even though it happened just a few years ago, Kiyoshi's memories are vague when it comes to the important parts. There was something abhorrent between me and my mother. Kiyoshi remembers the meaning of his sad, perverted daydream while being toyed with in his own memories.