OBA-047 Incest Takashi, sorry for being a perverted mom... Bamboo Under Thousand Crystal.

Chiaki raised her only son, Takashi, single-handedly. Sometimes gentle, sometimes strict, Chiaki interacted with Takashi as a noble 'mother,' and Takashi respected her for it. However, such a mother-son relationship was about to crumble. 'Mom, I have a girlfriend.' A few days after Takashi's statement, Chiaki witnessed Takashi and his girlfriend having sex at their home. Seeing her son's penis rubbing against his girlfriend's vagina, the 'woman' within Chiaki awoke...