It's just a manga filled with author fantasy and some people just makes ridiculous commentary. If you don't like don't read. Stop yourself there before the artist stop making her arts ┑( ̄Д  ̄)┍ . Not only you read in illegal site you dare to makes such ridiculous statements for what she made. Go to hell (︶︿︶)=凸
Bro, I think I'm start siding with yoohyun cuz, if my loved one and only push themselves like Yoojin, I'm literally gonna chain him. I really can feels yoohyun worries cuz my mother did the same everyday (putting herself in condition that strain her body so much despite her age) I'm so mad with Yoojin. Please makes your only brother feels better. Now I can perfectly picture why the Died Yoohyun choose to not involving Yoojin in his life ヽ(`Д´)ノ