Official version: Six years of secret love and four years of love. He left her because of his dream.
He broke into her life at a low point in her life. Companionship is the longest confession of love.
Short version: The story of a newbie in love encountering his second love
PS: The heroine has a growth type, no Mary Sue, no golden finger.
Concept: There is no Mary Sue in life, she is the protagonist and also a supporting role