"It isn't like me to live while depending on others", says Chisaka Mishizu, an easily misunderstood 26 year-old who's devoted to her work in sales at a clothing company.

One day, she was assigned to train the always smiling and puppy-like new hire. She thought that he'd be an adorable junior coworker but he sometimes makes unexpected expressions and also does unexpected things...!?

This is the start of an office romance between a lady who's bad at getting spoiled and a puppy-like younger man!