Takuro, a student preparing for his entrance exams, begins spying on Ichika, who has moved into the apartment next door. Ichika is a childhood friend and someone Takuro admires, but due to his gloomy, reclusive personality, he can only peek at her from afar. As he spies on her every day, he is filled with the desire to get closer to her, and finally crosses a line that should never be crossed. He prepares himself to be reported, but from that day on, he gives in to her unexpected seduction and has sex with her every day.