A Wild Last Boss Appeared! (野生のラスボスが現れた！) is a Japanese light novel series written by Firehead and illustrated by YahaKo. It was initially serialized on the user-generated novel publishing website Shōsetsuka ni Narō from October 2015 to April 2019. It was later acquired by Earth Star Entertainment who published it under their Earth Star Novel imprint from February 2016 to April 2019. A manga adaptation illustrated by Tsubasa Hazuki began serialization on Earth Star Entertainment's Comic Earth Star website in June 2017. An anime television series adaptation produced by Wao World aired from October to December 2025. A second season has been announced.
Plot
Exgate Online is an MMO dominated by a single player's avatar—Lufas Maphaahl, the "unofficial last boss". Since others cannot enjoy the game like this, she faces off against the other top players in a "final battle" and, as planned, is intentionally defeated. After the battle, the player receives an in-game prompt from the Goddess of Creation of the game's setting, offering him a "new role". Assuming this to be a message from the game's developers, the player promptly accepts, after which he finds himself in the body of his avatar, 200 years after her defeat. Learning that her NPC subordinates—the Twelve Heavenly Stars—are on a rampage, Lufas sets off on a journey to stop them, all while having to bear with her infamy as the Black-Winged Conqueror who once subjugated the world.