Donghyun's real-life hero is his mother, who is a caring, risk-taking, and determined housewife in Korea. She helps neighbors and her family, donates her time, and supports Donghyun's education. She takes on challenges, tries new things, and studies Chinese and for her driving license. Overall, she helps others, cares for her family, takes risks, and perseveres, making her Donghyun's real hero in his life.