Yokohama Kaidashi Kikō is a slice‑of‑life series that follows the quiet days of Alpha, a robot who runs a small café on the outskirts of a future Yokohama where the sea has swallowed most of the land and roads are now buried beneath sand or water. Though customers are scarce, Alpha is content, sharing the café with the elderly proprietor of the nearby gasoline stand and his grandson, Takahiro. Alpha serves as the café’s caretaker while her owner is on an indefinite leave.