One morning, a sudden scream echoes through the house, and son Hiroshi rushes anxiously to his mother Norika. His face bright red, he shouts in a confused and uneasy voice, "Mom! What's going on with this?!" Surprised, Norika looks down and sees her son's fully erect morning wood, her mind swirling with shock and confusion. Realizing he's staring at her body with a sexual gaze, a sudden warmth spreads through her chest. Unable to suppress her emotions, she secretly touches herself in the bathroom, soaking wet. The next morning, Norika unexpectedly comes to check on her son's morning erection. All eyes are on how Hiroshi will react to this unexpected development.