Haha, oh boy do I feel conflicted over this... once again, I know it's not a weight loss manga, but it always feels a little bit cheap to use magic or alchemy as the ultimate cop-out. So you can eat whatever you want, and any extra calories get automatically converted into magical energy?
Boy, that sure is useful.
Still better than that one manga where the girl used special bath salts to shed weight quickly, ughh.