
her brother seems strict like a dad? i dont think he hates her

Even though they are strict, they are way way way to strict. You’ll find out later, but our FL is amazing in every possible way, but it was never enough for her family. Can you imagine being pushed in such a way? Your mental state. The way they treat her reminds me of E-rank Healer.
http://www.mangago.zone/read-manga/e_rank_healer/
Kate is adorable