Rio Sanada (Yuriko Yoshitaka), the president of "Sanada Health", is a famous and energetic industrialist. When she met Daiki Miyazaki (Kohei Matsushita) again 15 years later, Daiki was a detective and Rio was an important witness in a murder case. 15 years ago in 2006, Rio, a third-year high school student, was in love with Daiki, the ace of the track and field club. Daiki also admired Rio and decided to confess his love to her after her recommended entrance exam. One night, an incident occurred in the dormitory. Rio's mother Azusa Sanada (Hiroko Yakushimaru), who was worried about Rio, sent lawyer Kenichiro Kase (Arata Iura) to find Rio. @哦撸马