Indefinity said: Too much exercise caused her chest to deflate? Oh that's gold.
That's much crueler than losing your hair. EDIT: From the perspective of the image, it doesn't look, as if Saitama-chan's (a name for the female version of her like Ranma-chan is a fandom name for the female version of Ranma) chest were flat (look the small bulges to both sides of the chest area of her costume), it just looks, as if her breasts were smaller than genos-chans.