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]
0verflow's PureMail video game was adapted into a two-episode OAV in 2001.
0verflow's Imouto de Ikou! video game was adapted into a two-episode OVA in 2003.
0verflow'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 hentai OVA 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!!