Tomonobu Moriwaki

Rena Sasaki (Keiko Kitagawa) is a beautiful woman with excellent memory and intelligence. She becomes a private detective and risks her life to chase down evil private detectives, because her younger sister was murdered by a stalker. The person that provided information to the stalker on her sister's location was a private detective. (asianwiki.com)

Sakurai Misaki is suddenly dismissed and has difficulty finding a new job. She meets Shibasaki Chiaki, her first love in high school. He invites her to live and work with him and his two brothers at the restaurant that they run together. (imdb)