Unless you have the same concept of masculinity as k-pop fans.
edit: upon looking at many pictures of her, depending on the picture/angle (this one you posted is not one of them), one could say she has a bit of a strong looking chin/jaw line, just a bit though, but that's not abnormal in women really.
Not every woman with a skinny physique / toned muscles is a man.
What specifically do you think is masculine about the face? No Adams apple, no big brow ridge, no male jawline, full lips.. ?
there's nothing masculine about the face...
Unless you have the same concept of masculinity as k-pop fans.
edit: upon looking at many pictures of her, depending on the picture/angle (this one you posted is not one of them), one could say she has a bit of a strong looking chin/jaw line, just a bit though, but that's not abnormal in women really.