This season contains two story arcs: the first 7 episodes continue the "Avatar" arc (アヴァタール編, Avatāru-hen), which adapts material from the final chapter of the 49th volume to the second-to-last chapter of the 51st volume of the Fairy Tail manga by Hiro Mashima, depicting Natsu, Lucy, and Happy's journey to reorganize their disbanded guild; the remaining 44 episodes form the "Alvarez" arc (アルバレス編, Arubaresu-hen), which adapts material from the last chapter of the 51st volume to the manga's conclusion, depicting the guild's war with the militaristic Alvarez Empire, and Natsu's final battle with his adversaries Zeref and Acnologia.