True Love {Haesoo ff}

This story is about a girl who works at a Restaurant, She was very kind hearted and really caring but she grew up without parents and lived with her grandma, jisoo has no idea where her parents are nor she has a courage to ask her grandma about, Haein was a single parent with one son, his son was really disturbed because he didn't have a mom no matter how much love haein gave his son. This series is about the Love story between Haein and Jisoo, how they met, where they met, why did they like each? Did haein's son approve jisoo has a mom?