"Sisters: Natsu no Saigo no Hi" (Sisters: The Last Day of Summer) is a Japanese visual novel developed by the doujinshi (indie) group, Minori. It was later adapted into an anime film. The story revolves around two sisters, Asa and Akane, and their interactions with a mysterious figure named Sou.
The story centers on a protagonist who returns to a rural countryside town during summer vacation. He stays at a house inhabited by two sisters. The game focuses heavily on the atmosphere of a fleeting Japanese summer—fireworks, cicadas, and the passage of time. The "Last Day of Summer" title implies a narrative focused on a limited, precious timeframe and the melancholy of endings. sisters ~natsu no saigo no hi
Some of the themes explored in "Sisters ~Natsu no saigo no hi~" include: "Sisters: Natsu no Saigo no Hi" (Sisters: The