Kevin's expression changed when he heard Mo Ling's question.
He kept silent for a while and thought of his bitter past.
His father wanted a normal life. So he married a girl from an average family who he loved with all his heart.
But his fate as a Smith family's son didn't allow him to lead a happy life.
The power struggle within the family shadowed him to the end even though he expressed his will to not fight for the heir position just like him.
Due to a series of unfortunate 'incidents' that happened to his father, his already soft hearted and sensitive mother went into depression.
When he was eighteen she passed away. Up until then he saw his father accompanying his mother with a heavy heart.
Maybe because he experienced such a sad atmosphere growing up, he wanted to help people who's struggling with psychological issues.
But, the incident that completely shattered him was where his father went into a coma trying to protect his cousin.