Number Days Sim Date
- Developer: Pacthesis
- Publisher: Pacthesis
- Year: 2012
- Genre: Visual novel
- Platform/s: PC (free)
Number Days Sim Date offers more explicit representation of sexuality than related titles Chrono Days Sim Date and Lunar Days Sim Date, with a lesbian option included from the beginning of the game (rather than needing to be unlocked). Lena is a romanceable character.