ENDRO!

Naral Island is home to adventurers and magic users. The island is plagued by a recurring cycle of Demon Lords and Heroes, with each Hero born to defeat the Demon Lord. Juulia "Yusha" Charldetto is the latest Hero, leading a party consisting of Seiran "Seira" Élénoir, a responsible priest, Meiza "Mei" Endust, an enigmatic mage, and Fai Fai, a hyper-energetic warrior. The party attempts a complex spell to defeat the Demon Lord, but it fails, sending them back in time to their days as aspiring adventurers.