Not Another Isekai

Ian of Maris was just another high school kid. Okay, so maybe he'd been bullied a bit, and... alright he wasn't exactly popular... But he was fairly intelligent, most of the time. Then came the day when powerful magic pulled him from our world to another and, to make it all even worse, the person he'd 'replaced' had the reputation of being a brainless idiot. Life was certainly going to prove interesting...