Saito Hiroshi is a kind-hearted young man who grew up in a loving family. He is to start working in a long-established insurance company. Waiting for him on the first day is the strict HR employee Tsubaki Mako. The new employees start two weeks' training and the first thing Mako imposed on newcomers on the first day is to write "retirement wish". Mako declares that fifty new recruits will be narrowed down to ten people on the spot while training.