Chinatsu Hayase

Chinatsu Hayase is the younger sister of Masamune Makabe and a second-year middle schooler. Blessed with a metabolism that lets her eat without gaining weight, she freely raids her brother's room to snack to her heart's content. She never misses a chance to poke fun at Masamune's narcissistic tendencies or his obsessive workout routines—quite the contrast to his past struggles with weight. Despite her blunt, teasing nature, the bond between these two siblings runs surprisingly deep.