Kingdom Hearts Birth by Sleep

Also known as: キングダムハーツバースバイスリープ, Something Strange, Best Friends, To the Future

by Tomoko Kanemaki

Ten years before Sora fought to save the worlds, three young Keyblade wielders named Terra, Aqua, and Ventus trained in the hopes of becoming Masters one day. But everything changed on the day of Terra and Aqua's Mark of Mastery exam, and the three each set off on their own journeys that would test their friendship-and alter the course of their destinies forever. (Source: Yen Press)