Nearly 29 and still single, Kawai Yoshiko suddenly finds herself alone when her boyfriend—who she expected to marry—dumps her. Her hot yet expressionless co-worker, Yuuki, says he will marry her if she can't find someone by the age of 30. What is it about his proposal that makes Yoshiko's heart beat out of her chest? She's feeling things she never has before. Find out whether or not Yoshiko and Yuuki actually get together in this mixture of office romance and pure love story!