Isekai Shoukan wa Nidome Desu

There was once a man who was summoned to another world and saved it Of course he became too popular there and turned into an isekainormie However that man fell into a trap and was forcibly returned to his original world Moreover he had to start over as a baby
This is the story of the waytoofantastic exhero who lived as a gloomy highschooler as he gets summoned once again to that same other world in a very unexpected development