Dondon Kawatteiku Giri No Ani To ImoutoDondon Kawatteiku Giri no Ani to Imouto; どんどん変わっていく義理の兄と妹; Dondon Kawatte iku Giri no Ani to Imouto; Steadily Changing Stepbrother and Stepsister

A younger sister looks down on her brother who got fat.However, her brother suddenly started dieting, and she's bewildered at the sight of him who has changed!A heart-pounding, warm and fluffy comedy of stepsiblings on a diet!(Source: Amazon)