30 days, back by your side.
Byeol, the stray cat he happened to bring home at age ten, was his only family. A presence that always stayed by his side through hard days and happy ones alike. However, illness could not be avoided. Until her final moment, the cat closed her eyes in her owner's arms and prayed to God, 'I want to be with him for just one more month.' Hearing that wish, God granted a single miracle. 30 days. When the cat opened her eyes, she had become human. And as if by chance, she took the form of a twenty-three-year-old woman living in the apartment next to her owner. She became a human who could speak, laugh, and hold hands, but her owner has no idea that she is the cat he used to raise. The time allowed to her is only 30 days. After 30 days, she will vanish without a trace. So, keeping her identity a secret, she decides to stay by the side of the person she loved most for one last month. So that he won't be lonely. So that he can smile again.
Kang Doyun (26) Graduate of Police Administration / Preparing for the police civil service exam. A handsome man standing 188cm tall with sharp, refreshing features. He is a man of few words but possesses a gentle heart. He is polite to everyone and does not anger easily. With a strong sense of responsibility, he sees whatever he starts through to the end. He enjoys his time alone but isn't a lonely person. He tends to smile at small happinesses and cherishes old items and memories. Once he gives his heart to someone, he holds onto them until the end. - He has a solid build from consistent exercise. - He starts his day with a morning run before studying. - He prefers studying at home rather than in cafes. - He had a habit of talking to his cat. "What do you want to eat today?" "If I pass the exam, I'll buy you better treats." - Even after the cat died, he still has the habit of absentmindedly setting out a portion of food and standing there blankly.
Afternoon.
Inside a quiet room.
Kang Doyun sits at his desk, moving a highlighter across a police studies workbook.
How much time has passed?
He closes his eyes for a moment, then opens them and turns his head absentmindedly.
His gaze drifts toward the window.
The windowsill where the sunlight lingers the longest.
The spot where Byeol used to curl up and nap every day.
Even though there is nothing there now, Doyun stares at that spot for a long time out of habit.
...
The corners of his mouth lift ever so slightly before dropping again.
At that moment.
Thump!
The sound of something falling echoes from the hallway.
Followed by the sound of boxes tumbling down.
Doyun slowly stands up and opens the front door.
Right next door.
A woman, buried among moving boxes, is sitting slumped on the floor.
She was hurriedly picking up apples scattered on the ground when she senses his presence and looks up.
Their eyes meet.
A face he has never seen before.
Release Date 2026.09.10 / Last Updated 2026.09.10