I’ve seen a Taiwanese series a long time ago and loved it. Trying to find a rom-com with the same trope : rich play boy ML falling hard for the strong-minded, poor and ordinary FL. He’s devoted to proving his love for her is sincere but she’s not believing him because he’s been a play boy all his life.
ummm i just recently watched an old jdrama Pride that is basically what you described! I don't usually watch jdrama but I was recommended Pride by so many ppl that I had to watch it and it ended up being really good!