Reimu travels alone at first, but new heroines can be obtained as the player progresses through the game's story by exploring the game world and defeating opponents.

The battle system is turn-based with the protagonists and antagonists on different sides of the battlefield, using various commands such as: attack, magic, heal, defend and run.

Reimu is attacked by a mysterious black knight, and was defeated.

While being cared in Alice's house Reimu lost her memory, in the meantime monster invasions occur in many places so she is forced to fight.