Peach Pluck

An isolated island is discovered, and its seemingly time-forgotten inhabitants are now being reintroduced into society. However, the truth is that the island was the hidden home of many supernatural creatures, and that it was actually the Onigashima of the legendary demon-fighting, peach-born Momotaro's adventure. Some of these demons seek to take their vengeance on the descendants of Momotaro. The Momotaro descendant, Momomoto Akira, is a middle school girl who reluctantly becomes a friend of one of the transfer students, and then soon becomes a target of the other vengeance-seeking demons!

(Source: MangaHelpers)