One day, Sumire Iwaya stumbles upon a huge box in front of her house. Inside the box is a man. Later, she takes the man home and learns that his name is Takeshi Goda. Takeshi wants to live in Sumire's house, so Sumire suggests that he becomes her pet. Takeshi agrees and this is how they begin to live together....

Based on the popular manga of the same name, the TV series features the heroine Murakami Maiko, who is 24 years old and has never been in love before. She decides to go on a blind date on the advice of her father. The date, Harumi Hanazato, is 44 years old and has been divorced once. They develop a crush on each other during the blind date and decide to get married after only three dates....