Thank you @fuyukimi for the translation
Here are the last 6 questions in YC's interview from the guidebook. I will translate JM's portion later if nobody got to it yet before me hehe
How does it feel to have acted out this love story with Park Ha that traversed time and distance?
YC: I believe it is the same in acting any type of drama, especially with a setting that traverses time and distance, if one does not fully immerse himself into the character, it will not create the feeling of falling in love. If one is not serious about acting, and does not make it real enough, to the audiences it'd be just like a fantasy, or it may make people feel as if it was very artificial. On the contrary, when one is totally immersed into his character and acts after he has fully understood the feeling of love across time and distance, it will make people's heart ache. I cried many times while filming this production, as well as Ji Min-sunbae. Once you've fallen into this uninmaginable love, it is very difficult to pull yourself out from it. While filming, I've maintained this state of continus heartbreaking love.
The love scene that you still remember even now is?
YC: The wedding scene in Episode 19, and the scene where Lee Gak and Park Ha were lying in bed, face to face, and saying "Thank you" was very memorable as well. But where I had the deepest impression was another scene. In Episode 19, we filmed it but due to time constraint it was not broadcasted. After Lee Gak has returned to Joseon, Park Ha cried as she reminisced and sat at the bench where the two of them had always sat at. Because Park Ha was too sorrowful and thought of the scene where Lee Gak appeared and disappeared as he smiled. As I understood very clearly what kind of feelings the two carried, my heart was pained as I watched Park Ha who cried and myself who smiled. Right! I also really like the scene where I helped Park Ha wear the necklace. I knew clearly we were about to part, and when I was putting the necklace on for Park Ha and she touched my clothes, the feeling of heartache rushed toward me and I felt unbearably pained. At that time my feelings were so confused I didn't know what to do, and finally at the wedding scene, I started crying badly when we were just rehearsing. Ji Min-sunbae cried furiously too! It was the first time I've seen someone crying like that.
You cried too during the kiss scene, is this part of the script?
YC: No, in this production I have had the experience of crying unconsciously, and the kiss scene is one of them. Especially the first kiss with Park Ha, it was not only a simple confession, it also carried the implication of Lee Gak giving up on returning to Joseon. After understanding Park Ha's feelings and giving up his mission on solving the mystery of the Crown Princess' death and bringing his 3-man entourage back to Joseon, because of this thought, tears came down unconsciously.
Is it awkward filming the kiss scenes?
YC: As I said before, Ji Min-sunbae is a very cheerful and straightforward person. We had only filmed together for around four months, but it was as if we were friends who knew each other for ten years. Therefore even though this was the first time filming a real kiss scene, it was easier than the light kiss in filming "Sungkyunkwan Scandal."
In the last scene, whether the person holding Park Ha's hand is Lee Gak or Tae Yong, I believe the audiences already have their own answers. What are your thoughts on this, Yoo Chun?
YC: As I acted, I believe it is 100% Tae Yong. Tae Yong holding Park Ha's hand and becoming Lee Gak is not because Lee Gak returned to modern time, but it is to portray the love and nostalgia between two people who are not able to meet again. The scene was imaginary, but the content being delivered is very real. Although Tae Yong is Lee Gak's reincarnation, he does not have any of his previous life's memories. So in the script when Tae Yong went to Park Ha's cafe, he did not carry any thoughts as he saw Park Ha. But I think it is too pitiful to leave Park Ha alone, so I made some changes, and finally in the act it became Tae Yong looking at Park Ha meaningfully, then smiling slightly.
What are the rewards of [acting in] this production?
YC: I believe it expanded my horizons as an actor, and the thought of wanting to act is becoming stronger. It's not that I want to zoom in on improving my acting skills, but that I want to enjoy acting. Rather than feeling the pressure that acting can bring on, what I want to experience is the joy of acting. Although one can act well through careful analysis, to fully immerse oneself into his character and act naturally thus is another way of displaying one's acting skills. In "Rooftop Prince," I've experienced the joys of displaying emotions and actions outside of the script, so from now on I want to try more different characters, and one day I will become an actor who can express himself just by his acting skills and does not require make-up and lighting, nor care about filming angles. Of course I may encounter difficulties in the future, but I don't think instances like "Miss Ripley" will happen again. At that time I had immense pressure that I must act extremely well, but "Rooftop Prince" was a turning point, and it changed the way I viewed productions. From now on, I will act in a more enjoyable manner in any production.