he's the second lead (female lead is adopted so not really biologically related to him). also one of ji sung's seven personalities have a crush on him (ji sung and park seo joon actually won best couple for this drama)
the key to enjoying this drama is to appreciate how evil the step mother is. hear me out. she's evil. if you let her, she'll ruin the whole drama for you. but if you appreciate her evilness while rooting for the main characters at the same time, the drama is watchable. pretty good even.
he's the second lead (female lead is adopted so not really biologically related to him). also one of ji sung's seven personalities have a crush on him (ji sung and park seo joon actually won best couple for this drama)