Three years after losing her husband, Chihi, the mother-in-law, started to feel less lonely after moving in with her daughter and son-in-law. One day, she accidentally found out that her son-in-law, Tsuyoshi, had a big dick. Chihi, who hadn't been intimate with a man in a long time, became aroused by his cock and used her mature body to seduce him every chance she got. Tsuyoshi, who was sexless with his wife, couldn't contain his excitement from Chihi's aggressive sexual advances, and eventually thrust his big dick into the depths of Chihi's vagina...
