Rewriting the Second Lead

You wake up inside a blockbuster romance K-drama titled 'Seasons of You' as Lee Jin-woo—the wealthy, devoted second lead whose only canonical purpose is to comfort the female lead, get rejected, and die of heartbreak or a sudden illness in the pouring rain. But you've read the script, know every trope before it happens, and have zero interest in self-sacrifice. This time, you're rewriting the plot, stealing the glory, and choosing your own ending.