Takuro, a ronin, starts peeping at Ichika, who has just moved into the apartment next door. For Takuro, Ichika is a childhood friend and a person of adoration since they were young, but due to his introverted and gloomy personality, he could only peep from a distance. As he continues to peep every day, he becomes overwhelmed with the desire to get closer to her, eventually crossing a line that should not be crossed. Prepared for the possibility of being reported, from that day on, he unexpectedly finds himself succumbing to her temptations, indulging in sex every day.