beta
I panicked as soon as she appeared because I thought she was MC's mom (or a relative) what a jumpscare lol
Anyway the one-sided rivalry between siblings is so sad to see. Reminds me of another manhwa where the older brother also have this mindset (I forgot the title) because the parents have been spoiling him and telling him he'll inherit everything his father owns. He's worst than Soohwan though. Much worser.