Cotton (Japanese: コットン, Hepburn: Kotton) is a series of shoot 'em up video games developed by Success.

Instead of warships and battlefields typical of most shoot 'em ups, Cotton games put players in control of a witch riding on a broom and tasks them with fighting through magical haunted kingdoms.

[4] Cotton is classified as a "Cute 'em up", which is a sub-genre of shmups that tend to have unusual, oftentimes completely bizarre opponents for the player to fight.

All of these stories revolve around the obsession of a young witch named Nata de Cotton with a magical type of candy called "Willow".

Although her quests in each game are ultimately to serve a higher purpose, she is never involved personally for any reason other than the prospect of getting to eat a Willow.