The thing is, we and the author know that he isn’t gonna end up with the brother. I really don’t like the ml, it’s like he didn’t just lost his memory in the car crash but also his rationality ┑( ̄Д  ̄)┍ I think the author went too far into the stupid amnesia trope
I can’t even tell anymore if he is just a huge Tsundere or if he has 0% interest in Sua
I think more like that he is a tsundere, Likes suah but at the same time he is disappointed in him