Overweight Mage's Slice of Life

Carl is a mage from another world. He transmigrated and occupied the boy with the same name and looks as his. The boy however wasn't as talented as him and he lived the life of a loser. He was weak and constantly bullied at school. Moreover, he was fat. Organizing his memories, the world called Earth was a completely different world from where he came from. It had advanced technologies and machines he never thought was possible. And the most shocking part was that otherworlders in Earth was a lot common than he expected. At first, Carl expected to go with life built by cultivation and peace, but little by little, he finds himself pitted against the big powers of the world. --- A/N: English is not my first language. Do not expect the story to be grammatically correct everytime. But I will improve. The cover is mine.