Miracle Dieter Miyuki

yukimi, a chubby junior high student, discovers a magical dumbbell that can transform her into miyuki, a beautiful and slender young woman in a revealing costume. but she must do battle with an evil three-star chef who tempts young girls with calorie-rich treats and dubious weight loss products, and keep her identity secret from her family and schoolmates. there is a sequel, “miracle dieter miyuki vv.” it is being serialized in shimbun akahata. as of oct 2009, there are no plans to publish it in tankoubon format.