So just fall for me

Ai is a simple office worker. However, she looks just like the company president's daughter! As her foster mother, the president sometimes places great trust in Ai to secretly play the part of her daughter, Tokiko. One day, Ai goes out to meet Nagare Kuonji, the heir of a conglomerate and Tokiko's fiance, but unexpectedly, he ends up taking a liking to her!