Sentimental Graffiti Yakusoku is a sound novel game based on the Sentimental Graffiti series of dating simulation games. It is not actually a game, it is more like a text novel with voice-over about the first meeting of protagonist and each of twelve girls during childhood.

There is only one CG for each girl and the background is just the place where the conversation or action takes place.

[Edited from psxdatacenter]