This is a new series of incest. However, it's not the standard 'mother and son,' but rather 'grandmother and grandson' as the theme. A young, beautiful, big-breasted, and kind grandmother... If you were the grandson, wouldn't you make a mistake? I think there's an image that 'grandma is nicer than mom and listens to anything.' The story dramatizes how this goes beyond bounds into a forbidden relationship. The scene of the young grandmother in diapers is incredibly moe.
