One day, my mother's friend, Sayuri, comes to our house to attend her son's graduation ceremony. Her beauty is so great that it's hard to believe she's the same age as my mother. My son, Shinji, is so nervous that he can't even look at her... Feeling love for her innocent appearance, Sayuri surprises her with a kiss. Shinji, who has never dated a woman, escapes into the bathroom to keep his cool. However, once his body becomes heated, Sayuri can't contain it and sneaks into the dressing room...