FERA-168 The mother, Saiki Oishi, was continuously raped and humiliated by her insolent and hated son.

Saki and her son Shingo have a strained relationship, to the point where they curse each other every time they meet. This day was no different; they started insulting each other, and Saki threw the word 'unpopular' at Shingo, knowing it would bother him. Humiliated, Shingo's anger boiled over, and he retaliated with physical force. Despite trying to resist, Shingo was no match for his mother's strength... In the end, Saki was subjected to humiliating treatment, forced to perform sexual acts on her own son.