Amagami ("Gentle bite"), 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.
Source: Wikipedia, "Amagami", available under the CC-BY-SA License.