Satomi feels that her beloved Tsukamoto-kun has rejected her because she is fat. In order to get him back, she starts dieting, but she doesn't seem to lose her weight. One day, while jogging, she finds a dirty and strange doll with the words "Just wear this doll and you will lose weight and become beautiful"...!? 大好きな塚本(つかもと)くんに、太っていることで交際を断られてしまったと感じたさとみ。彼を見返すためにダイエットを始めるが、なかなか体重は減ってくれない。ある日、ジョギング中に見つけた、薄汚れて奇妙な人形には―この人形を身につけるだけでやせてキレイになります―という文字があって…!?