In the chart posted above it says that the sister is her half-sister in the book and has a crush on LYY so perhaps…
I think the reason they never mentioned she had a sister was because they don’t get along. Why would she mention someone she doesn’t get along with l know it’s her sister but she’s giving jealousy
The doctor part is hilariously absurd, but the most unrealistic thing is this man never even having a girlfriend…
In many Asian countries men might actually not date till their older because of their school and careers resulting in them never having girlfriends till they are in their late twenties or early thirties
l can’t wait to watch this part