Sentimental Graffiti is a sequel that takes place after the events of the first game. The story follows Kouhei Shiina, a 2nd year university student who joins a photography club in search of models for his photo exhibition. He meets twelve heroines who become potential partners, each with their own unique personality and charm.
The gameplay involves exploring both 1st-person and 3rd-person isometric perspectives. In the 1st-person perspective, Kouhei interacts with characters and examines objects up close. The 3rd-person isometric view allows for traversal of the city, which features various locations that can be accessed. The game's world changes depending on the time of day, with different graphics and activities available during morning, twilight, and night. The map consists of 29 locations, some of which can be explored in greater detail from within.