Lee Whan wanted his brother to answer him, not some strangers. Even if they were his little brother's friends, they were strangers to him. They might have cared for his little brother and been close to him for years, but that did change the fact that they were strangers in his life.
And he still firmly believed others should not get involved in their family issues.
The current predicament was suffocating.
None of this would have happened if his mother did not treat his little brother so poorly.
None of this would have happened if their father intervened and stopped their mother's attitude towards his little brother.
None of this would have happened had he paid attention to his little brother. He would have done something if he knew about it earlier.
If only his brother had told him about his suffering.