Ohashigawa is a self-proclaimed elite stud. One night, after picking up a girl at Roppongi and getting on a taxi, he met with a traffic accident, and found himself in an unfamiliar room after waking up. And when he looked into a mirror, he shrieked in horror. For what is reflected in the mirror was a fat and ugly girl from another world, Ellie. As Ohashigawa distressed over what to do, he came to know of the painful circumstances Ellie underwent when she lost what was most important to her. Thus, he swore to go on a diet, dress up, study business management, go on adventures and just lived as he wished. This is the success story of a fat and ugly Cinderella!!