A series of 4 short visual novels by Campus.

Each game in the series focuses on one of the four heroines:

[[Himeno Satsuki]] - [[Haru_Uso_-passing_memories-|Haru Uso]]
[[Izumi Aoi]] - [[natsu_uso_-ahead_of_the_reminiscence-|Natsu Uso]]
[[Eris Fall Cartlet]]
[[Teidou Setsuka]]
uso (campus)