School Days is a Japanese slice-of-life eroge visual novel developed by 0verflow, released on April 2005, for Windows. It was later remade as a DVD game and ported to PlayStation 2 (PS2) and PlayStation Portable (PSP). The story follows Makoto Ito, a high school student who becomes the love interest of several girls during his second term. School Days has multiple endings depending on the player's choices. Some of these endings later became notorious for their graphic violence.
0verflow announced work on School Days in October 2004 and marketed it by showing off the game's innovative use of animated cutscenes and voice-acting. Following its success, 0verflow produced multiple sequels, including a spin-off of the original story called Summer Days, a parallel story called Cross Days. Klon developed the spin-off Island Days for the Nintendo 3DS. A School Days remaster, School Days HQ was released in October 2010, and localized in North America in June 2012. The original game became unavailable for purchase after April 2011.
Following the game's release, School Days was adapted into different media. A manga adaptation was serialized in the Kadokawa Shoten magazine Comp Ace and it was later published into two volumes. Comic anthologies, light novels and art books were also published, as were audio dramas and several albums of music. An animated television series, two direct-to-video (OVA) single releases and a concert film were also produced, the first of which became a precursor for an internet meme when its finale was pulled from broadcast.