The moment Hee-joo started speeding, the kidnapper went "aw man, not this shit again" which is kinda darkly funny…
He seems to have great affection and a need for her. At first, I thought it was because fake son loves her and OG wants to take her away from fake son but it seems deeper than that. I hope for a flashback to clear that up.
There's a part of me that thinks the "master" is the chairman/HHJ stepfather. He knows there's a murder gene in that family and doesn't want to see that in the Blue House. But, I would flip my fruit loops if the fake son/BSE is behind this elaborate plot.
SFL has some warped jealousy and entitlement. She's jealousy of the way in which people love and are devoted to Ha Na. I bet she concocted that diabolical plan to get 2ML to leave Ha Na and then get with her, but she lost to Ha Na because 2ML refused to move on. Now she's losing again to Ha Na, so she needs to once again concoct a diabolical plan so Cheol Hui will be devoted to her only. Nasty bish!!!!
As expected, ex's sad excuse of an explanation was dumb af. But of course FL would forgive him later, because…
The fact remains that the 2ML and 2FL planned and executed a disgusting and painful plan. Then, they felt no remorse and 2ML only has guilt when drunk after 3 f'ing years. Nope, no forgiveness here for either one. He ran scared and 2FL is complicit.