The Time Travel Hero Returns, It's This World That's Wrong

The brave man who conquered SSS and another world returned and became the king who destroyed the world! What if the other world is opened and the hero who returns is not the same person? What would the world be like if every savior turned into an abuser? Are these former brave men at fault? Or this collapsed world? ? ? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.