This is too early to judge as there are only 21 chapters released but I would like to say although not new but interesting concept. Author will have to work hard on improving MC's personality. Previously he was timid, everybody stepped on him, ignored him. Now since he's overpowered I don't wish for him to suddenly chage his personality like a switch but gradual improvement.Comming to the story, synopsis says it all. MC is useless in his world and even after he goes to other world. When it's time to return to his world, time freezes. MC hunts the immobile monsters to gain levels and become stronger. The instant dungeon arc was a little boring although it was short.Hope the story keeps getting better. I guess MC will soon return to his world and face everyone where he will surprise them.