Island Days is a tower defense visual novel developed by Klon in collaboration with 0verflow for the Nintendo 3DS. It is a spin-off of 0verflow's Days visual novel series, in which Makoto, along with his various female companions, finds himself stranded on a remote island. While awaiting rescue, Makoto and the others must do their best to survive on the island.

Island Days is a tower defense visual novel developed by Klon in collaboration with 0verflow for the Nintendo 3DS. It is a spin-off of 0verflow's Days visual novel series, in which Makoto, along with his various female companions, finds himself stranded on a remote island. While awaiting rescue, Makoto and the others must do their best to survive on the island.