Soetani Uzuki is a contract worker who lives a modest, yet peaceful life, with her pet cat, Jujumaru. She also has a theory that, "all handsome men have a hidden dark side."

Recently, to better her life with Jujumaru, Uzuki accepted her company's offer to become a permanent employee. But the workload turned out to be harder than she imagined and one day, Jujumaru fell sick. When she had to choose between her job and her cat, the man who had just moved in next door suddenly offered to look after Jujumaru. This man turned out to be Yamada Aki, someone Uzuki couldn't forget even if she wanted to...