Naruto: Kakashi's Story — Takashi Yano

A year has passed since the Fourth Great Ninja War, and Kakashi's appointment as Hokage looms. But first he heads to the Land of Waves for a dangerous mission rescuing hostages from a top-secret airship. There he confronts a ninja whose heart is frozen by tragedy.
Having lost both his friend's eye and his greatest abilities, can Kakashi protect anyone from his coldhearted foe? What is the true meaning of the Will of Fire gained in the distant heavens? Kakashi finds these answers and more as he enters a new ninja era.