Long before Sora was chosen by his Keyblade, the worlds’ safety lay in the hands of Keyblade Masters. Three youths — Terra, Ventus, and Aqua — have been training long and hard under Master Eraqus to prove that they, too, exhibit the Mark of Mastery. But they will soon find themselves in the middle of a crisis affecting worlds far beyond their own—just as another Keyblade Master, Xehanort, goes mysteriously missing. Three friends, three destinies. Everything will link back to the beginning. (Source: Amazon)

Kingdom Hearts: Birth by Sleep is based on Square Enix's Playstation Portable video game of the same title. The series was published in English by Yen Press under the Yen On imprint as a 3-in-1 omnibus volume on March 19, 2019.