"The perfect son can do anything like well-done study also personality." is "엄친아"(ŏm-chi-na) in Korean.
It is abbreviation of “엄마 친구 아들 (Mother’s friend’s son)”엄친아 (Eom chin a) means "son of the friend of mother " and it is used in the sense of "Skilled perfect boy”. In the conversation of mothers. They are always busy at praising their own child, and telling ‘My child is a perfect boy/girl’. And people call that ‘perfect boy as 엄친아 (Eom chin a).