I was reincarnated and became slim, but then I gained weight again. This is the story of how I made an effort for the first time in my life and lost 10kg.

Ayame, who is chubby, a recluse, and an introvert, receives yet another rejection letter this year and falls into despair, losing consciousness at home. When she wakes up, she has been reborn as the slender beauty "Aya." She starts a modeling job and even gets a handsome boyfriend, living a smooth life. However, her personality hasn't changed. She leads a self-indulgent life and gains weight again. At that moment, she is helped by her fellow model, "Satsuki"!? This is the birth of a reincarnation shape-up comic, supervised by Ai Togawa, author of "First Muscle Training for Weight Loss," which has sold over 700,000 copies in the series, allowing you to enjoy dieting while following the story.