The drama is based on the same-titled short story in the last book "Tonari no Onna" written by Mukoda Kuniko who passed away in 1981 and features on human nature, love and the subtleties of the heart. The theme of the drama will focus on the regeneration of the family and deviate from the original story with newly-added developments. Kai will be playing the role of Lee Ji-won, a cameraman from South Korea who meets Kishigawa Naoko, a 31-year-old single lady who works as a saleswoman at the lingerie department of a departmental store. Due to Ji-won's presence, Naoko's family slowly goes through a change which leads to the exposure of secrets which the family members are hiding from one another. This ultimately leads to the breakdown of the family and a sad romance between Naoko and Ji-won. The heroine Naoko will be played by Kurashina Kana while her father Shuji and mother Sue will be played by Sano Shiro and Takahata Atsuko. Naoko's younger sister Junko will be played by Furuhata Seika.