After having sacrificed herself for Ethea's humanity, Hikari is saved by Kingdom Hearts' light, able to continue being its protector and vanquishing the forces of darkness. However, now she is tasked by Master Yen Sid and King Mickey to go back and explore the other half of Ethea, informed of new dark forces that need to be eradicated. Along with her twin brother, they set out to that world, a mission in at hand, but how will she react to seeing the others? The more important question is, how will the other react to seeing their companion alive? How will her lover feel?
4 parts