intro: U-PRINCE is a series of 12 series, each having 4 * 1 hour episodes, and features one young man's journey in finding love in his life.. it's set in the environment of university, and to some extent all the stories are connected, since all young men are making an appearance in other's stories as side characters.
That said, you don't really have to follow the "order of appearance", but, for those who like to keep things chronological, this it the order:
Part 1 : Handsome Cowboy
Part 2 : Gentle Vet
Part 3 : Lovely Geologist
Part 4 : Bad-ass Baker
Part 5 : Absolute Economist
Part 6 : Foxy Pilot
Part 7 : Playful Comm-Arts
Part 8 : Extroverted Humanist
Part 9 : Single Lawyer
Part 10 : Crazy Artist
Part 11 : Badly Politics
Part 12 : Ambitious Boss
Generally, these are ALL cute stories, made to make you smile.

Part six of U-prince series lifts us up in the air.
To those who wrote synopsis: have you watched the Show? because I have.. and it doesn't really match what you wrote. So, to those thinking about watching, let me tell you: it's about an insecure movie star who has been faking smiles for so long it became a reflex; and about a person who's stuck-up and hard to open up to others.
Put those two people together, sit back and enjoy the Show.
They are cute together, and they also learn from one another. One learns how to smile, the other how not to. The moral of the story is: it's OK not being OK, because we're our own people, and we're not here merely for public's entertainment. That's the message of this part.
Delivered in a cute way, letting us see how a FL can be the one perusing.
Then, add a dash of misunderstanding, dumbest possible way of testing weather or not you're feeling something for someone, some publicity issues with a screaming agent, anti-fans (hey, if they boost your rating, why not?), couple of great friends. Oh, and.. and airplanes. Why not? It was a nice mix. Kind of..
Hm.
Let me try to explain the feeling of this part. Let's say we're making a cake. But, we're entertaining children, so we let them decide some of the ingredients and do the decoration. But, as adults, we've made the main batter so that we know that the foundation of our cake is good.
Same with this Show: at one moment I really thought there must have been a wild party, with everybody pitching in some ideas onto a solid base. That turned into a show.
Guess what: that cake actually tasted sweet. :)
It was refreshing and didn't even mind being shown a fairy-tale.

As for the phrase, I'd say it's this one:
"I think, even though you may be hated by many people; at least you would know who sincerely loves you"
Preach! :)