Even in the last chapter I didn't like the feeling of that "brotherly love" .... sorry not my type. The main couple was perfect, even the brother with that doctor, but after that 

Undiagnosed but something ain’t righ.
The summer Natsuki lived.
https://www.tiktok.com/@ni.yane?_r=1&_t=ZN-96a5FOTgFwE