Shy and bullied son Kazuya brings over his childhood friend Jun'ichi, stirring emotions in his mother Maki. Unbeknownst to her, Jun'ichi has been quietly making moves behind the scenes of the bullying, and Maki gradually begins to develop feelings for him without realizing his true intentions. Growing up in a single-father household, Jun'ichi harbors deep attachment toward mothers like Maki, and uses her kindness to slowly close the gap between them. As her long untouched vaginal walls are intensely rubbed deep inside, Maki gradually loses her rationality and reaches climax. Her aching womb, despite its hesitation, proves powerless against Jun'ichi's presence.