The turning point for the heroine is learning to reject people, stop being the good guy, and say "no" at the right time, so she messes up the wedding of her sister and her supposed lover.
I really like the scene where the hero and heroine are drinking and singing in the pub. Sometimes people really need to vent when they are slightly drunk, and others are also very happy to let this emotion infect themselves, sing and dance along.
To sum up: first, try to help others without going against your will; second, it's also good to drink some wine occasionally and sing loudly as a little lunatic :)
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