Arata is a hot-blooded guy who aims to become a hero and runs about every day helping others along with his osananajimi Akari. One day, he received a mail looking for heroes to save the world. He thought it was just spam, but it was actually a genuine contract mail. His room became a gate to another world Ragnagia and an epic adventure full of laughs and tears awaited them… or so he thought.
It took a mere day for him to defeat the maou and save the world. After hearing the ending theme play, seeing the credits roll by and a short epilogue, the gate to the other world shut and it was the end of this story.
However, when he returned to his room he received the same mail as before and the gates to Ragnagia opened once more. It seemed that the maou would reappear after a set period. When he arrived at the maou’s castle, he discovered that the new maou Ciel was useless. He helped her instead of attacking her and she fell in love with him at first sight.
When he and Akari returned victorious, they found out that they couldn’t return back to their original world. So, they continued their hero duties while looking for a way home. Will they be able to do so? And what is the meaning behind the respawning maou?