After learning that her son Ataru is troubled by being uncircumcised, mother Reiko resolves to comfort him. Gently lowering his underwear, she carefully lifts his uncircumcised penis and tenderly wipes it clean. Feeling the warmth, Ataru blushes with slight embarrassment, but Reiko proceeds to take his developed member into her mouth, performing gentle, loving oral sex. Overcome with surprise and shyness, Ataru trembles, yet finds his heart deeply soothed by Reiko's tenderness and affection.