Haiiro no Otome

Kagami Tsutako is an office worker at an advertising company and has been stalking Ii Azami, a man whom she has had a crush on for 20 years. One day, Tsutako was following Azami as usual and witnessed a hit-and-run accident. When she visits Azami in the hospital, she learns that he has amnesia and decides to lie that they are lovers. Despite being afraid that her lies will be exposed, Tsutako remains firm as her desire to become Azami's lover grows.