Amagami , is a Japanese dating simulation game for the PlayStation 2 and the spiritual successor to KimiKiss, both of which were developed and published by Enterbrain. Amagami was released on March 19, 2009. As of November 2010, six manga adaptations have been produced: two serialized in Enterbrain's Famitsu Comic Clear, two in Hakusensha's Young Animal and Young Animal Island, one in ASCII Media Works' Dengeki Maoh and one in Kadokawa Shoten's Comp Ace. An anime adaptation titled Amagami SS aired in Japan from July 1, 2010, to December 23, 2010. An anime sequel titled Amagami SS+ plus, pronounced as "Amagami SS Plus", aired in Japan from January 6, 2012, to March 29, 2012. Seiren is a sequel to the similarly-structured Amagami adaptation, set in the same high school, albeit 9 years later.

Enterbrain (エンターブレイン), formerly Enterbrain, Inc. , is a Japanese publisher and division of Kadokawa Future Publishing founded on 30 January 1987 as ASCII Film Co., Ltd. . Magazines published by Enterbrain are generally focused on video games and computer entertainment as well as video game and strategy guides. In addition, the company publishes a small selection of anime artbooks. Enterbrain is based in Tokyo, Japan, with a paid-in capital of 410 million yen. Enterbrain's current president is Hirokazu Hamamura.