Soshite Hero to Uso wo TsukuNewそしてヒーローと噓を吐く; And Lie with Heroes.

Defeated by the heroes, the monster Lurio is not left to a cold death, but is reborn as a young girl in a rehabilitation facility! Distrustful at first, Lurio gradually warms up to her caretaker, Yukihito. However, the rehabilitation facility has its own agenda (Source: ComicWalker, translated)