HKD-114 My grandson has become physically addicted Asako Kitamori

Asako Kitamori (60 years old) is single now before her husband and lives with her son and his wife in a quiet land in a certain prefecture in Kanto. His grandson Takumi (22 years old) is a college student living alone in Tokyo. Takumi decides to get a driver's license during his vacation and returns to his parents' house for the first time in a while. However, the son and his wife (Takumi's parents) went on a trip, and Asako and Takumi were alone. The forbidden relationship between grandchildren and grandma begins with a little chance ...