Han Seojin's girlfriend killed me. The cat he cherished more than his own life.
Five years ago, in an alleyway where rain was pouring down in torrents.

That day, it was purely by chance that the priority of my world changed.
A tiny kitten, soaked to the bone and shivering with an injured leg under a parked car. Without hesitation, I took you to the hospital, and after a difficult treatment, I barely saved your life and brought you home.
After much thought, I remembered the superstition that giving a pet a human name makes them live a long, healthy life, and I named you Guest.
From that day on, my life began to revolve entirely around you.
People didn't understand me. My phone lock screen and gallery were filled only with you, and everyone called me crazy when I would jump up and head home during a date just because it was your feeding time.
But I never hesitated, not even once.
Because to me, no one could ever be more precious than Guest.
Yoon Chaea was the same. Even when I left because of you, she forced a smile and endured it, even mimicking cat-eye makeup to try and stay by my side.
But my gaze was always fixed on you, rather than Chaea, who would grab my sleeve as if pleading.
Our peace, which felt like it would last forever, collapsed so pointlessly.
I opened the door as usual, but you, who always ran to greet me first, were nowhere to be seen.
After searching the house in a panic, I found you in a corner of the living room, your body already cold.
I pulled you into my arms like a madman, rubbing my cheek against yours and calling your name.
"Guest... Guest..."
No matter how many times I wailed and shook you, the only thing that returned was your already cold body temperature.
The vet said it looked like pesticide poisoning.
With that one sentence, my world collapsed right then and there.
I was the one who barely saved you from under a car five years ago.
I protected you more preciously than anyone, giving you a human name just so you'd live a long life, but the guilt of failing to protect you until the end swallowed me whole.
I wailed all night, holding your small body and calling your name until my throat was hoarse.
I was completely broken in the despair of having lost you.
Where the pesticide that drove you to death came from.
Even today, I live submerged in endless sorrow, trapped in the guilt of failing to protect you.
With the sound of the door lock, Yoon Chaea quietly entered the house and approached Han Seojin, who was sitting blankly in the middle of the living room. It was only the second day since Guest, the cat who had been Han Seojin's entire life for five years, had stiffened in a cold corner. The warmth and traces of Guest still remained throughout the house, making the space where only the core, Guest, had vanished feel eerily silent.
Oppa, I'm here... It's really hard, isn't it? I was worried to death about you... Have you eaten anything at all?
Chaea gently comforted me and stroked my hair. Her embrace as she held me was warm, and her sadly trembling voice was clearly offering consolation to me for losing Guest.
But as I buried my face in Chaea's arms and stared blankly at the wall, a very faint scent brushed past the tip of my nose.
From the edge of Chaea's sleeve, and from the gap in the bag she brought... the faint, stale, and pungent smell of pesticide, characteristic of chemicals.
It was the smell of the exact same substance the vet said was detected in Guest's stomach.
Chaea's voice reaching my ears was infinitely kind and sorrowful, but in that moment, it felt as if all the blood in my body was turning ice cold.
Since that day, my world has completely turned upside down. From the moment I realized the eerie truth hidden behind the kindness and the smell of pesticide on Chaea's sleeve, my every breath had been frozen cold.
Just then, while I was barely holding on in the silence filled only with traces of Guest, a familiar sound hit my ears from the bottom of the front door.
Scratch, scratch!
It was the exact same sound Guest used to make, scratching the inside of the front door out of joy whenever Seojin returned home for the past five years.
Before my body could even react, my footsteps headed for the entrance first. When I opened the door, there stood Guest, who had become a person. It was clearly the form of a stranger I had never seen before, but not a single moment of confusion or even the slightest bit of wariness arose. The moment I saw those clear, lingering eyes that fully contained me, every sense in my body was screaming with certainty. It's you. My everything, my Guest, who has returned to me as a human.
Without a moment's hesitation, I reached out my hand toward you, standing at the door.
Release Date 2026.08.12 / Last Updated 2026.08.12