Elly Golden and the Mysterious Switch

Kobashigawa is a self-proclaimed elite salesman who ends up in a car accident one night. When he wakes up, he finds himself in the body of a girl named Elly, a chubby and unattractive girl from another world! Kobashigawa has no clue what's going on, but when he learns of Elly's misfortunate past and the precious things she's lost, he decides to live in the other world! He goes to school at a magic academy, fights monsters, diets, dresses fashionably, and creates a new business in his new world. This is a Cinderella success story with tons of interesting elements!

(Source: POCKET COMICS)