Overflow (オーバーフロー) (stylized 0verflow) is the adult game brand of Japanese video game company Stack Ltd. (有限会社スタック) known for its School Days franchise.[3] Stack's headquarters are located in the Sugishō Building (杉商ビル) in Kanda, Chiyoda, Tokyo.[2]
Overflow's PureMail video game was adapted into a two-episode OAV in 2001.
Overflow's Imouto de Ikou! video game was adapted into a two-episode OVA in 2003.
Overflow's School Days video game was adapted into a 12-episode anime series in 2007.[3] Both School Days and Cross Days have also received manga adaptations.[4]
Stack's Welcome to Pia Carrot!! video game series was adapted into a three-episode hentaiOVA from 1997 to 1998. Its sequel, Welcome to Pia Carrot!! 2 was adapted into a three-episode hentai OVA from 1998 to 1999, and a six-episode OVA titled Welcome to the Pia Carrot!! 2 DX from 1999 to 2000. The video game also received an anime film titled Welcome to Pia Carrot!! -Sayaka no Koi-monogatari- in 2002.
On February 10, 2012, 0verflow confirmed that Shiny Days, a remake of Summer Days, would be the last title produced by the brand.[3] Customers were told that the company would continue to support their line of video games.[3][5]