Days

The "Days Series" is a series of adult romance adventure games released by Overflow.

The main setting takes place in Sakakino High School and its surrounding area, depicting the love triangles and physical relationships created between the protagonist and the female characters using a game system combining a huge number of animations and command selection methods within a time limit. 0verflow calls this game system "0verflow Realtime Scriptsystem" (ORS).

Currently there are 3 mainline games: School Days, Summer Days, and Cross Days. All three works are planned and written by Mathers Numakichi, the representative of 0verflow, and the character design is by Junji Goto, an animator known for numerous TV anime and OVAs. There is also "Shiny Days", a remake of Summer Days.