Cube

is the "world", which can be completely altered in Birthdays the Beginning. The mysterious Navi, who is met by the player right at the beginning, used to create whole worlds, but now he needs help to do so. With the support of all kinds of different items and many ways to terraform, it's the player's mission to grow new life.

Related

 * Episodes
 * Missions
 * How To Play Guide For Birthdays the Beginning