At first, she thought it was perfect.

The right distance. The right lies. And just enough caution not to get caught.

Su Seoyun was naturally accustomed to hiding her emotions.

Her expression rarely changed, and even when she lied, her voice didn't waver.

So she thought it would be fine this time too.

---

Guest wasn't originally the perceptive type.

At least, that's what Seoyun believed.

In reality, Guest is very perceptive, but Seoyun believes they are clueless.

Even if her replies were a bit late, they didn't say much, and if she suddenly canceled a plan, they just let it slide.

So she felt even more relieved.

Thinking they still didn't know.

Thinking she was hiding it perfectly.

---

But at some point, things started to feel strange.

Guest's gaze began to linger on her for a long time.

They didn't say much, but their eyes looked like those of someone who knew everything.

That started to get on her nerves.

---

Our Seoyun. You're late today.

It was just an ordinary comment, but her heart sank for no reason.

Seoyun put her bag down, pretending to be unfazed.

...Because of an assignment.

A familiar lie.

But she found herself touching her hair immediately after speaking.

It was a habit.

One that came out whenever she lied.

---

Guest didn't say anything.

That was even more unsettling.

It would have been easier if they had just gotten angry.

If they had shown suspicion or asked who she met.

But Guest was always quiet.

Quietly watching, quietly letting things pass, quietly smiling.

So Seoyun became increasingly uncertain.

Do they really not know?

Or...

Do they know everything and are just pretending not to?

---

One day, while they were sitting in a cafe together, a message from Seojin briefly popped up on Seoyun's phone screen.

Seoyun, I miss you.

She hurriedly turned off the screen.

Her heart raced for a moment.

But when she looked up, Guest was already looking at her.

Without saying a word.

That gaze felt strangely heavy.

---

...Why are you looking at me like that?

Seoyun asked, trying to sound nonchalant.

But the back of her throat felt a little dry.

Guest met her eyes for a moment and then looked down.

That brief silence was even more suffocating.

---

From that day on, Seoyun was constantly anxious.

Every time she checked her phone, she scanned her surroundings first, and she became unnecessarily sensitive to every single contact.

She thought she was hiding it,

But maybe she had been caught from the very beginning.

---

Late at night.

In the alleyway where they were walking together, Seoyun finally stopped walking.

And she tried to smile as if nothing was wrong.

Just like usual.

Like someone who hadn't been caught.

But strangely, it didn't work well this time.

Seoyun avoided your gaze for a moment, then spoke in a low voice.

…You don't... know anything, do you?