I dont remember the manga....i read some day ago on mangafox its about a guy who was sent back and hes now a 27year old hicicomori in their history.(they made a fake history because he wss sumoned to another world)..and he kept all his ability and hes breaking the things at his workplace because he still cant control his power. i wanted to read its novel and i wrote it return of the former hero....but its not the same with what i read so im little confused.... the guy mature and he was sent back to earth when he didnt needed anymore....i read it 1week ago i think.... help pls thx