So my guess is that the woman at the end is actually found by either Eunsung or the driver because she is somehow involved in something shady that Jungwoo was involved in before (maybe even he plotted with her to isolate and ruin Jaehyun’s reputation in high school??). But then later on this could be a piece of blackmail that Eunsung could use against Jungwoo/turn Jaehyun against him? (No spoilers though plz)
So my guess is that the woman at the end is actually found by either Eunsung or the driver because she is somehow involved in something shady that Jungwoo was involved in before (maybe even he plotted with her to isolate and ruin Jaehyun’s reputation in high school??). But then later on this could be a piece of blackmail that Eunsung could use against Jungwoo/turn Jaehyun against him? (No spoilers though plz)