Being a better brother

Madam Byun was always happy. She was happy after giving birth to her first son Chanyeol, she was happy after giving birth to her second son Baekhyun who is mentally disabled. She found strength to be happy again after death of her husband. Now she has no strength because she found that she has breast cancer. Things are too difficult now and she needs Chanyeol to look after Baekhyun.