Kurata Kenta lives with his father, Taichi, his mother, Keiko, and his younger sister, Nana in an isolated home in the suburbs. He works as an unpopular commercial designer. Kenta possesses a timid personality, which he picked up from his father. Kenta doesn't like his father.

One day, while waiting for the train, Kenta warns a man who pushed a woman and cut in line. Kenta is surprised that he spoke out with his normally timid personality. After that incident, Kenta's family home is targeted by an unknown person with flowers from their garden being pulled out and the seat of a bicycle being torn. Also, Kenta's younger sister Nana is stalked by her ex-boyfriend.

Kenta and his family try to find out who is responsible.