A rainy-night convenience store game, from three sentences

It started from three sentences. That is the whole prompt budget SuSu is claiming, and the result is a convenience store in the rain.

A Japanese konbini at night is a demanding target because everyone carries a precise memory of one: warm light spilling onto cold blue streets, rain streaks, reflections in puddles, signage in Japanese, shelves, an ATM, bicycles parked outside. Get one surface wrong and the spell breaks. Here a long-haired girl runs through it with a clear umbrella, and her stride looks natural.

The author is candid that the release version was fixed up and given more detail after the first pass. That makes the claim more believable, not less: three sentences got the scene started, and the iteration made it a game.