Here are some key narratives in the drama that reflect the complexity of the relationships between Won, San, and Rin.  These include subtle exchanges and monologues that reveal their unspoken emotions, underlying tensions, and layered connections.

Episode 7: Won's Monologue During the Chaeryeon Festival

Looking back after so many that have passed, I realized it was on this day when everything began. My friend whom I trusted more than myself, began to deceive me.

An impassable chasm began to form between me and my woman; one that neither of us could cross.

He was my only friend and she was the only woman I loved.

Looking back after all these years, it was on this day...

I knew nothing...

Since I was the only one who didn't know anything, I smiled.

Episode 8: San's Monologue when she found out that Won is the Crown Prince

Since the first time I have met them, I was never planning to see them again. That is what must be done by someone who has to hide her identity for the rest of her life. However, those moments were so good and made my heart ached, so I languished everytime. Since we'll have to part anyway, it'll be okay to stay just for today. Just like this. One more day. Just for today.

It feels good and it was painful. The person who always smiles at me, has a pitiful smile. It makes my heart ache. And the person next to him, would always avoid looking at me. Whenever I turned towards him, he was always looking somewhere else. So it makes my heart ache.

Who among them makes my heart ache more?

Episode 8: When San found out that Won is the Crown Prince and Rin is the Chancellor's Third Son

San: Let me ask you one thing. From the start, you never spoke to me informally, even when I was just a lowly servant. Why is that?

Rin: Because you are the woman that my master holds in his heart. It has been like that from the very beginning.

Episode 9: Rin's Monologue when he and Won are fighting then San suddenly appeared

His Highness is being deceived by me. As expected, the Crown Prince has no idea. It wasn't for his sake that I wanted to leave. The reason I wanted to go is because of me—because every day, piece by piece, my heart is crumbling apart.

Episode 9: Won's Monologue When San is tending to his wound after his fight with Rin

When did it start? These two won’t look each other in the eye. Instead, she looks at me, talks cheerfully, and smiles. Meanwhile, the man who doesn’t know how to wear a fake expression or tell a lie, looks away, hides behind long silences, and even plans to go far away...

It’s not that they don’t want to see each other. They’re just trying hard not to.

Episode 9: San's Monologue when she found out that Rin was the one who saved her before

Now I know whose hand kept me safe that night. If I were to ask him why, he would simply say it was because his friend had asked him to watch over me…

Now I understand why my heart flutters and aches from time to time. They share a beautiful friendship, and they look so good together. I’m afraid that I might be the one to ruin that bond...

Episode 11: Won and Rin are talking about San over a drink

Won: For just a moment, I thought about letting So Hwa go. A brief encounter, a fleeting moment of bliss and togetherness—that's sometimes enough. When flowers are in full bloom, their beauty is meant for just that moment.

Rin: It’s better not to look at...

Won: Flowers that have started to wither. Watching them wilt, fall, and rot would ruin even the beautiful memory of their full bloom. That’s what I forced myself to believe.

Rin: Then why did you hold onto her?

Won: I couldn’t do it. I can't go a day without her by my side.

Rin: Have you asked her? If she would stay by your side?

Won: No, not yet.

Rin: What will you do if you ask, and she says no?

Won: There’s nothing to be done. I told you, I can't go on if she’s not here.

Rin: Even if it means keeping her in a large bird cage?

Won: That’s right.

Rin: And if she's miserable? If she says it’s miserable inside that cage?

Won: It won’t come to that.

Rin: How can you be so sure?

Won: Why do you ask me that? That she could be miserable? Next to me?

Episode 12: Won's Monologue when he traveled with Rin to see San in the field of flowers

So, I’m building an aviary. For her. An aviary so vast she won’t even realize she’s in it, so beautiful she’d never think about leaving.

That day, she rested briefly among the red flowers in full bloom. From the moment I saw her smile, I knew: to have her, I might abandon everything—even my friend, even myself. Yet, I couldn’t help it.

That day... we smiled achingly, and that moment was fleeting.

Episode 14: San saved Rin's family from being deemed as the ones responsible for the death of her mother, letting go of her long-standing quest for vengeance. Rin went to San's household to apologize to her and the Minister of Finance. Rin told her that he is thankful to her for saving his family but he knows he isn't worthy of her forgiveness. He also knows that he should protect her but he won't be able to since he has to leave. 

Rin: Are you okay?
San: No.
Rin: Don’t be sick.
San: You didn’t do anything wrong. In fact, you’ve done the opposite—you save me whenever I’m captured, catch me when I fall, and wait for me when I cry. But you know, on the day my mother passed away, I was holding her tightly in the carriage all the way home, and she was so cold. I couldn’t forget that feeling. That’s why I don’t think I can pretend nothing happened and stay close to you.

Episode 15: Won's Letter to San

Eun San, my So Hwa, I apologize for not being able to see your late father off with you. 

There was a time when I had to choose between you and Rin, and without hesitation, I chose you. But this time, I will choose Rin, not you, So Hwa. Just as Rin laughed it off, will you be able to smile and accept my decision?

Do you remember what you told me once? And do you also remember what I said to you? Always and forever, you will be my first, and you must never forget it.

Because my heart is restless, and I feel utterly helpless. I am relying on the promise of this necklace as I make my request: San, my So Hwa, return to me. Stay by my side.

Episode 16: When Rin kissed San

Rin: You said there’s a single thread connecting you to the Crown Prince, right? It must be the red string of fate. That thread, I will cut if for you. Right now...

Episode 17: Won's Monologue after witnessing the kiss between Rin and San

Mother loved peonies. A woman who rarely smiled, she would smile when she saw peonies—and sometimes, she would even cry. When I asked why she cried, she answered, "It would’ve been better not to have known that these flowers existed in the world. I shouldn't have known. No matter how beautiful they are, I should not have liked them." Her words planted seeds in my young heart, and they grew into a tangle of thorns. Just when I thought I had forgotten, those thorns would prick my heart again. No matter how beautiful the flower, cherish it only to the point where you can let it go. Give only what you can take back, so you can turn away whenever you need to, so you can abandon it. Be wise enough to keep it that way. I believed, firmly, that I was doing just fine that way. But I was wrong.

Episode 18: Rin's Monologue as Won appeared with his guards to capture him

Since I was little, I was always one step behind. Not because I was slow, but simply because I started off that way. I preferred to watch instead of stepping forward. When I saw you happy, I felt happy too, and that’s why I found comfort in staying one step behind.

I was always one step behind you. This way, I could protect you completely. If I were to look away, I worried that you would crumble in that moment.

Episode 19: Rin's letter to Won

The times I have spent behind you, protecting you and supporting you, as well as the moments spent with you, have all been an honor for me. However, I have come to love a woman whom you have in your heart. As my feelings grew stronger, my yearning became overwhelming, to the point where I could no longer control it. I know that this sin is worthy of my death, so I will not attempt to run away from it. If I happen to survive, please allow me to leave. I will live on somewhere I cannot be seen, as if I were dead.

As your loyal servant and lifelong friend, a brother in spirit, I earnestly ask this.