Nana, a schoolgirl, is an only child with working parents who live in an apartment. She has a quiet personality and a childlike, innocent look, just like a real schoolgirl! The apartment where she lives also houses Takimoto, a gloomy part-time worker. Every time Takimoto passes by her room on her way home from school, a twisted and mysterious desire burns within him... Not content with just secretly taking pictures of Nana... he finally sneaks into Nana's room while her parents are away...