[1] It was supposed to be followed by a 2011 PlayStation 3 sequel titled Zettai Zetsumei Toshi 4: Summer Memories, though the release was cancelled due to the 2011 Tōhoku earthquake and tsunami.

[3] Players can choose to play as a boy (Naoki Kōsaka) or a girl (Rina Makimura), both of whom start the game trapped in a bus a tunnel after a large earthquake.

Survivors the player can encounter include Saki Honjō, a nurse turned amateur musician, and Ayami Hazuki, a high school girl.

The character's status bars can be replenished or reduced by consuming food and medicine, or completely restored by resting on a bench, which also allows the player to save the game.

Leaving his home for a new life in a Megalopolis as a university student is a dream come true for Naoki (or Rina, if the player chooses to play the game as a girl).