A Wild Last Boss Appeared!

A Wild Last Boss Appeared! (野生のラスボスが現れた！, Yasei no Last Boss ga Arawareta!) is a light novel series by Fire Head with illustrations by YahaKo. A manga adaption called Yasei no Last Boss ga Arawareta!: Kokuyoku no Haou (野生のラスボスが現れた！黒翼の覇王) featured art by Tsubasa Hazuki. It is serialized in Comic Earth☆Star.

Plot
It was in the year 2800 of the Midgard calendar. Back then, there was a Overlord who once reigned supreme and had reached the very brink of subduing the world. Her name was Ruphas Mafahl, a great woman dreaded as the Black-Winged Overlord. She was too strong, too fast, and too beautiful… However, she was defeated by Heroes who opposed her ferocity, and her ambition was brought to an end. ――or so went the story of our protagonist's in-game character, whose body he now possesses for some reason in a world 200 years after Ruphas' downfall.

Follow our protagonist as he becomes unnecessarily feared by his surroundings and unnecessarily worshiped by his former subordinates as he―or now she―cheerfully travels around this fantasy world.