While it starts off in a ragged state, the player can build up with new functions to travel through islands.

[2] The player can roam the island, take part in many activities, and progress through story missions or take on side quests.

If the player returns the emotions for Kaguya, her spirit stone releases "Heart Keys" and open doors to new worlds.

[3] By collecting them, the player can bring about changes to the setting and world, and expand the journey to new areas.

Depending on the selection, the conversation partner can release Hearts indicating their reaction.

[4] Kaguya, an amnesic girl washed ashore, meets a swordsman Rick.

The song, entitled "Kokoro ni Todoku Uta" (心に届く詩), sung by Lia,[7] was released on December 15, 2010.