Iwaya (played by Noriko Iriyama) is a journalist. Her meticulous logic and neat style make her deeply trusted by her superiors. She is a real strong woman in the workplace. However, Iwaya's overly rigid and unsmiling personality often makes her misunderstood by her surroundings, and even excluded by colleagues and friends. Once, Iwaya had a conflict with her boss, so Iwaya was transferred to the unpopular life intelligence department. At the same time, Iwaya found that her boyfriend who had been in love for many years was cheating on her. Iwaya, who failed in both love and career, fell to the bottom of her life. One day, Iwaya found a large cardboard box at the door of her house, and a man was sleeping in the cardboard box. Iwaya brought the man home and learned that his name was Takeshi Goda (played by Jun Shison). Takeshi wanted to stay in Iwaya's home. Iwaya proposed that Takeshi be her pet, and Takeshi agreed happily. In this way, Takeshi and Iwaya began their cohabitation life.