Life begins to shine after the 40-year-old office worker who gave up her dreams, work and marriage starts working at a super elderly mature woman bar!

Arata Usui is a 40-year old office worker with no lover, no money, and no guarantee of relief after retirement. She wanted to get married but wasn’t blessed with a partner, and as she’s not young anymore, she felt small at work. One night as she was wandering the nightlife districts she finds a retro bar “OLD JACK & ROSE”. On the poster on the door were the words "Recruiting hostesses! None under 40".
“I want to change my life!” Arata takes the plunge and jumps in, to find powerful gorgeous old ladies in her fifties to eighties, at the other side of the door! She gets inspired by the ladies who survived the turbulent times of Japan so brightly and positively after the end of the war, and starts working as the “youngest” hostess at the bar “OLD JACK & ROSE”

夢も仕事も結婚も諦めていた４０歳負け組OLが超高齢熟女バーで働き始めたことから人生が輝きだす！

笛吹新(うすい・あらた)は４０歳で、恋人なし、貯金なし、老後の安心なしの負け組OL。
結婚はしたかったが相手に恵まれず、若くないゆえに職場で肩身もせまくなってきた。そんな時、夜の街をさまよい目に飛び込んできたのは一軒のレトロなバー「OLD JACK&ROSE」。扉の張り紙には「ホステス募集！　４０歳未満お断り」の文字が！
「これまでの人生を変えたい！」…新は思い切って中に飛び込むと、扉の向こうにいたのは５０代～８０代のパワフルでゴージャズな老婦人たち！終戦直後から、日本の激動の時代を明るくポジティブに生き抜いてきた彼女たちに刺激を受け、新は「OLD JACK & ROSE」の“最年少”ホステスとして働き始める。