Naoko Asada, 42 years old. Full-time housewife. Recently, I've been feeling strange gazes on me more and more. Gazes that convey a lewd feeling, like I'm being licked... My husband is always working overtime, so he's rarely at home, and only my only son, Hiroshi, is there. I never thought my son would look at me like that, but... It happened one night...