It is said that many working women in their twenties are clandestinely, sloppy and lazy homebodies. At work, they put on a facade of living it up in glitz and glamour, but at home, they live as ultimate sexless slobs! Hotaru Amemiya (Haruka Ayase), who works in the interior design industry in Tokyo, is truly one such homebody. She would rather sleep than date and loves to dilly-dally at home, clad in a stained T-shirt and sweat pants, drinking beer while scratching her behind. But her comfy homebody life is threatened when one day, her boss, Takano (Naohito Fujiki), moves into her house out of the blue. Then, at work, an up-and-coming young designer, Makoto Teshima (Kazuki Kato) returns from London, and Hotaru's life takes a new turn. She falls in love! How will the homebody girl respond to Makoto's bold move? Will she remember how to be feminine again?

故事的主人公是一名年轻美丽，却对恋爱没半点幻想的20代OL雨宫萤（绫濑遥饰）。白天她打扮斯文、工作利落。可是晚上一回到家，却是一个不修边幅，不爱收拾、煮菜，只爱喝啤酒的女子。活脱脱是「鱼干女」（意即生活好像生晒鱼干般，没有一点光彩）的代表。 「与其谈恋爱，倒不如在家睡觉」就是雨宫萤对生活的态度。                  

一次机缘巧合，雨宫意外地和公司的部长高野诚一（藤木直人饰）在同一屋檐下生活，不修边幅的她遇上刚分居的洁癖住家男，闹出了不少笑话。

另一方面，雨宫逐渐对同公司的新进设计师手岛城（加藤和树饰）产生爱意，到底这个爱意能否改变雨宫对恋爱以及生活的态度呢？