Beautiful mother Marina Matsumoto carefully guides her son through sex education as he begins to awaken sexually. However, she herself becomes intensely aroused by her son's sleeping face and his underwear. Unable to resist these desires, mother and son eventually become physically intimate. They share mutual masturbation, affectionately exchanging love as they progress into a forbidden relationship. Depicted through digi-mosaic, this shocking portrayal of sexual acts within the household challenges the boundaries between familial bonds and desire.