Who wouldn't like to suddenly be summoned to another world as it's mighty hero? But what if they didn't like you and sent you back... 118 times?
Well, you would probably end up annoying 118 gods, all quite different and some stronger than others.
This was what happened to young Leonidas before he was forcefully reincarnated into a new world. Now, with a brand new life ahead and a cute little sister by his side, he is ready to make a name for himself... or for the time being get out of the crib and learn more about the world around him. As for everything else? He'll just let S.A.R.G.E. deal with it.