Don't give up on your dreams, even when everyone tells you to. Na Hee-do never gives up on her dream of becoming a gold medalist fencer, even when her family and friends tell her it's impossible
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It's okay to make mistakes. Everyone does. Baek Yi-jin makes a lot of mistakes throughout the show, but he always learns from them and tries to be a better person
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True friends are the ones who stick by you through thick and thin. Na Hee-do and Baek Yi-jin's friendship is tested many times, but they always come out stronger on the other side
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It's important to forgive others, even if they've hurt you. Na Hee-do eventually forgives Baek Yi-jin for leaving her, and it allows her to move on with her life
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Love is a beautiful thing, but it's also complicated. Na Hee-do and Baek Yi-jin's love story is full of ups and downs, but it's ultimately a story of hope and resilience
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It's important to cherish the people you love because you never know when they'll be gone. Na Hee-do and Baek Yi-jin lose many loved ones throughout the show, but they learn to appreciate the time they have with the people they still have
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It's okay to not be okay. Na Hee-do and Baek Yi-jin both go through periods of sadness and depression, but they always find a way to overcome them
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It's important to have dreams and goals, but it's also important to enjoy the journey. Na Hee-do and Baek Yi-jin both achieve their dreams, but they also learn to appreciate the moments along the way
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Life is short and precious, so make the most of it. Na Hee-do and Baek Yi-jin both live their lives to the fullest, and they inspire us to do the same
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It's never too late to start over. Baek Yi-jin loses everything at one point in the show, but he rebuilds his life from scratch. It's a reminder that we're all capable of great things, no matter what our circumstances are