"O Renowned Heroes! You must assist the people of our country!"

There it was, the line you hear when you get summoned to another world. Our protagonist and his classmates were summoned to the world of Gresia. Our heroes defeated the Demon King and allowed the world some peace. Ren Hawakawa wanted no part of this, but he could accept it. It was all over, now he could go back home.

So the transportation ritual starts. The magic sigil appears... The words are chanted... The lights start to flash... And then...

"O Renowned Heroes! You must assist the people of our country!"

There it was, the line you hear when you get summoned to another wor--- Wait, haven't we done this before? And what's with this body?!