キー(Key) is a visual novel company that specializes in the creation of Nakigē.
On top of Visual Novels, they also collaborate on the creation of Anime, Manga, Light Novels and Music. They are a company responsible for a lot of things.

• Main Site
• 20th Anniversary Site
• VNDB
• I have a suspicion that Key is obsessed with baseball. I say this because, of the content they’ve produced that I’ve gone through, every one of them has baseball in it.