Himitsu: Yui ga Ita Natsu
- Platforms: Sega Dreamcast
- Developer: STARFISH-SD
- Year: 2001
- Genres: adventure video game, visual novel
Himitsu: Yui ga Ita Natsu is a adventure video game, visual novel game from 2001 by STARFISH-SD, available on Sega Dreamcast. This page lists its details and platform.
System requirements for this game have not been added yet.