One scene I can't shake is from 'The Unwanted Wife'. The whole buildup is about his cold neglect, treating her like a decor piece. After the divorce papers are signed, there's this moment where he's in their empty, echoing mansion, and he picks up a forgotten hair clip of hers. It's not a grand gesture. He just breaks down, realizing every single thing he took for granted was the only thing that ever mattered. The begging isn't even verbal at first; it's him showing up outside her new apartment in the rain, looking completely wrecked, just waiting for her to see him. What sells it is that the heroine is so done she barely reacts. His pleas then feel genuinely desperate, not just a plot device to get her back.
Another underrated example is in 'Luna's Revenge'. She leaves him after finding out he orchestrated their marriage for a business deal. Years later, when he's lost everything and she's rebuilt her life with success and a new partner, he tracks her down. The begging there isn't for her to come back to him—he knows he's lost that right. It's him begging for forgiveness, for any scrap of her time, just so he can say the words he should have said. The power shift is absolute, and his groveling feels earned because she's truly moved on. It’s a scene where the former cold CEO is literally on his knees, and you still kind of hate him, but you also see the raw regret.