The drama will begin with Minami and Chiyomi being neighbours and each other's first love since they were kids. However, their relationship has somewhat changed since the disappearance of Minami's father some years ago. One day, Chiyomi runs out of her house after an argument with her parents about her plans after senior high school. While out in the thunderstorm, Chiyomi makes a wish to return to her childhood days and finds herself shrunk to just 16cm after a sudden gust of wind and thunder strikes. Minami happens to find Chiyomi and brings her home to live with him which causes them to become closer to each other.
There were three drama adaptations in the past i.e. 1990's version featured Kudo Masaki and Ishida Hikari, 1994's version starred Takeda Shinji and Takahashi Yumiko while 2004's version showcased Ninomiya Kazunari and Fukada Kyoko.