Hiroyuki can't contain his excitement when his mother's friend, Kotone, becomes a tutor.That should be it, not to mention the well-equipped features, the huge breasts further stimulate his abundant libido.Then, Kotone, who noticed his gaze, teased him as if to clear her frustration.Since then, Kotone, who visits at every opportunity under the pretext of her tutor, continues to stimulate his inferiority and enjoys the hidden pleasure that her husband cannot taste.