A prequel titled Summer Days, was released on June 23, 2006, retelling the original game during summer vacation and from the perspective of Setsuna Kiyoura. Unlike its predecessor, however, Summer Days was almost universally panned for its heavily bugged state, loads of patches, and recall. Another spin-off titled Cross Days was released on March 19, 2010. Set in the same continuity as School Days, Cross Days follows the life of another protagonist, Yuuki Ashikaga, a high school freshman who also finds himself caught between the affection of two girls, Roka Kitsuregawa and Kotonoha Katsura, during his second term at Sakakino Academy. The game also features yaoi scenarios, during which Yuuki cross-dresses as a maid. 0verflow released Shiny Days on February 2, 2012, which is a remastered version of Summer Days with a new heroine and higher quality animations. A spin-off, Island Days, was developed for the Nintendo 3DS and was released in Japan on July 3, 2014. The game, developed by Klon, focuses on Makoto and the girls becoming trapped on a remote island and includes tower defense elements.
