Tsukiko is drinking alone in her local sake bar when by chance she meets one of her old high school teachers and, unable to remember his name, she falls back into her old habit of calling him 'Sensei'. After this first encounter, Tsukiko and Sensei continue to meet. Together, they share edamame beans, bottles of cold beer, and a trip to the mountains to eat wild mushrooms. As their friendship deepens, Tsukiko comes to realise that the solace she has found with Sensei might be something more.