go backMart and Tetra
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#1 One day, me Tetra was walking in a dungeon. I helped Mart, ex-Demon king by chance. She took my body, so I was lost, but... "I will make you Hero. Let's defeat the present Demon king with me!!" I was so weak that I dreamed of becoming a hero. I decided to take the proposition of ex-Demon king to defeat the Demon king. Me, who can't fight but can save magic power, and ex-Demon king, who can fight but can't save magic power. Will we be able to defeat the Demon king in the end?