It's supposed to be split in two I think, the second half is the child's story
Sung suho is sung jinwoo's child, he shows up at the last chapters aka the epilogue aka the bonus chapters
Sung suho's story here yay
Byul is the main couple's child
And here is byul's story
By the end they have a kid and he's pretty interesting
By the end the first child grows up and has his own couple of chapters
First half is the parent's story
second half (from ch66) is their son's
The first part is the main characters aka the parents story, the second part is their kid's story where he is the main protagonist, and the parents are basically background characters. Tbh I only read the kid's part to see the parent's cameo but otherwise I don't recommend the kid's story, it's kinda mid, and he's the abusive one in his relationship, it just feels so much like his parents story, although I do recommend reading the parent's story it's nice,
Hell Intern