I love how the ML realized a bit too late that he is in an unmarried woman's bedroom, an unmarried princess mind you, and she is like "what?" As if she doesn't either care or doesn't see how improper it is to be the only two unmarried people in the room, at night, while she is in her nightwear. She must have the balls of steel and some level of trust that this man wouldn't be stupid enough to harm her.
Also, clocked in immediately as soon as the Count made his appearance and Birna's hair color are suspiciously similar range of pinkish red, hers more on the pinky orange side because her mother's hair is dirty blonde so the shading is a factor of her hair being slightly lighter than the Count's that no one questioned it until the FL finally saw through her aunt infidelity.