There is a street piano placed in a music store on a shopping district. Sawamoto Ren is a young electrician who has stayed away from the piano for a long time, but decides to start to a new path as a street pianist after meeting Kajiwara Midori, the daughter of the music store owner. Soon later, people from various backgrounds stop by to play the street piano and have heart-to-heart interactions with Ren and Midori.
Nana runs an inn called Nakajima-so in a seaside town. One day, a young man named Fujii Shuntaro comes to visit and reveals that his girlfriend stayed at the inn one year prior, just before she died. Following in the footsteps of his lover, Nana takes on the role of guide and joins Shuntaro as he wanders the town.