Island Days is a tower defense visual novel video game developed by Klon in collaboration with 0verflow for the Nintendo 3DS.

[1][2] It is a spin-off of 0verflow's School Days visual novel series, and was released in Japan on July 3, 2014.

The story part follows a typical visual novel structure, in which the protagonist, Makoto, interacts with the various female characters and builds relationships with them.

The battle part is a tower defense game, in which Makoto and the girls must protect their food supply from wild animals.

As per many visual novels, the plot can take various courses based on the player's actions, such as who Makoto romantically pursues, or potential deaths among the characters.