the boss of "i'm not like other girls"

You mean Nanao? Pfft, no. Have you legitimately read the story? There are so MANY strong women characters. If this was a Mary sue “I’m not like other girls” story there would not be so many strong female characters. Her male lead’s youngest sister could be her own female lead of a different story. And even hom, a hero, is tied to 2 other “hero” male characters. What Nanao is, is a woman who was gifted with strong dark “yin” energy and has a rare seal gift. I guess that doesn’t make her like other girls but she doesn’t ever act like that in the story...