Is being in a position to rule the world and letting it go for a normal life not being ambitious and irresponsible?

A dynasty that was dethroned and the descendant that focused his life on revenge and taking back what's his, that story has been told a million times.
Here we have a dethroned prince who would have been emperor who tried at first but realized early on his temperament wasn't fit to being "the owner of the world". Why? Because he isn't cruel enough.
We meet him as a wanderer who is trying to find his place in a world, he has no "holy mission", he's just someone that wants to lead a happy normal life and a compassionate soul that will help those who he sees having a hard time.

A hero that takes every evil people as his duty to exterminate and always puts that above everything else, we've also been told that story.
But here we have a lead who just loves martial arts, she enjoys learning them, and more than fame or being the best or solving all the world's problem, she just can't witness injustice and pass it by. She just can't.
More than a mission, she has really strong no-negotiable principles that she's fully ready to die by.

What's most intriguing, this drama addresses that, it shows the character being aware of the risks and at time doubting and second guessing and I loved that. Is wanting a normal life not having ambition? No, you just have a different ambition than others. An ambition to be happy as you.

In this drama we encounter our leads helping others and becoming legends for it in their way to actually just live their lives, find themselves and their happiness. I personally think there's no grander mission than that.

The leads relationship also was addressed in such an splendid way. I love how this drama didn't shy to show them facing their own disagreements even when these were born out of qualities they love about the other. It's also one of those rare relationships where there's no really any stupid misunderstanding, these two know and trust each other and that is a constant throughout the story.
There's no passionate kissing though, but there's kissing, and I honestly loved their relationship development. First, they are friends and family. Second, they are absolutely head over heels for each other. It's that order. Is there longing? There is. Are there difficulties? There are. But even when they are apart (very briefly), they stand together. Is there jealousy? Very little, and almost in jest, but there are some moments too... even so they trust and respect each other too much to be overly possessive of the other.

Apart from the leads relationship, there're a lot of characters worth knowing in this drama. The secondary couples' love story was "meh" to me, but every other master or guide along the way was precious to me. And the friendships made along the way were too.

I loved this, I wish it had a better rating for it deserved it.