Mart and Tetra

** Story 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. Lets defeat the present Demon king with me!!" I was so weak that I dreamed of becoming a hero. I decided to take the propsition of ex-Demon king to defeat the Demon king. Me, who cant fight but can save magic power, and ex-Demon king, who can fight but cant save magic power. Will we be able to defeat the Demon king in the end? ** Game This game is RPG game. Switch two characters and defeat the Demon king(or Hero). Sex situation changes depen...