A nephew comes to his aunt Riho's house during the long weekend. He is alone with Riho, whom he has always admired... He can't seem to keep his sanity in this situation that he has dreamed of. Still, he volunteers to help clean the bathtub in an effort to help his beloved Riho, but... Her chest is wet with splashing water. Her beautiful big breasts are clearly visible through the water. His lust finally runs wild in front of her mouth-watering body that makes him sigh.