In Kyoto, soon after the war, Ichika strives to save her family's long established ryoten restaurant from financial crisis. In order to do so, she marries Yamaguchi Amane, who is 15 years younger, in a marriage of convenience.

Set in post-war Kyoto around the 1950s, "Nagatan to Aoto" depicts the life of Kuwanoki Ichika (Kadowakii Mugi), the daughter of a long-established ryoutei restaurant, who was left with only a kitchen knife as a keepsake after her husband did not return from war. Wanting to be independent, she decides to work in the kitchen of a hotel that focused on Western cuisine. Now at 34 years old, Ichika remarries a young man fifteen years younger than her and takes on the challenge to rebuild her family's restaurant together with her new husband. This is a gourmet love story that focuses on a couple with an age difference as they develop a bond while working towards saving her family's long-established ryoutei restaurant. Adapted from the josei manga series "Nagatan to Aoto: Ichika no Ryourijou" by Isoya Yuki.—Drama-Otaku