Onipan!

Three oni-kids who, through the power of the onipan (a portmanteau of "oni" and "pantsu") become human to help fix the relationship between humans and oni. The three girls transfer into a normal Tokyo high school to aid in their task and help fix their image by revitalizing the town, sometimes jumping headfirst into school events, and other times ... becoming idols! (Source: Crunchyroll News)

[Written by MAL Rewrite]