Menhera Shoujo Kurumi-chan - No ongaeshiMenhera Shoujo Kurumi-chan - No ongaeshi , Crazy Girl Kurumi-chan gives back , メンヘラ少女くるみちゃん。の恩返し

"My sister is beautiful, cheerful, bright, and homely", but she is actually a mentally unstable girl. This is the story of the younger brother "Taichi" who is swung around by his older sister "Nanase Kurumi".