For the next ten days, the girls of Room 301 successfully executed 'Operation: Invisibility.'

Whenever the heavy metallic click of Room 302’s lock echoed through the hallway, Bo-ram would dramatically throw herself onto the mustard-yellow sofa, holding her breath, while Ji-yoon would pause whatever crime podcast she was listening to. They would wait until the heavy, irregular footsteps of their neighbour faded down the stairwell before resuming their lives.

Ha-eun played along, mostly to keep the peace. But every time she heard that distinct, uneven limp walking past their door, her mind flashed back to the convenience store. She remembered the sheer terror in his eyes over a dropped coin. He hadn't looked like a predator. He had looked like prey.

It was a rainy Tuesday night when the invisible wall between the two apartments finally crumbled.

Ha-eun had stayed late at the university library, struggling through a mountain of introductory sociology texts. By the time she stepped off the bus near Haewon Villa, the rain was coming down in freezing, diagonal sheets. She hurried down the street, her umbrella doing very little to protect her canvas sneakers from the overflowing gutters.

She trudged up the dark stairwell, her muscles aching, dreaming of the electric blanket waiting for her in her room.

As she reached the third-floor landing, the flickering fluorescent light buzzed ominously overhead. Ha-eun stopped dead in her tracks.

Kang Do-jin was sitting on the floor, his back pressed hard against the door of Room 302.

He didn't have his usual oversized hoodie on. He wore a simple, faded grey t-shirt that clung to his shivering frame. Beside him sat two empty, green soju bottles. His knees were pulled tight to his chest, and his hands—still raw and bruised—were buried in his hair, gripping the dark strands like he was trying to tear them out.

He was shaking. Not just from the damp cold creeping in from the stairwell window, but from deep, violent, silent sobs.

Ha-eun’s breath hitched. She instinctively took a step back, the toe of her wet sneaker squeaking against the linoleum.

Do-jin’s head snapped up at the sound.

The defence mechanisms built over ten years of abuse kicked in instantly. Even intoxicated and shattered, his body went rigid. He scrambled backwards, trying to push himself through the solid metal of his door, his eyes wide and wild.

"I'm sorry," he choked out, the words slurring slightly. He threw an arm up to cover his face, flinching violently. "I'm sorry. Don't. Please."

Ha-eun froze, the umbrella dripping water onto the floor. He wasn't looking at her. His unfocused eyes were staring right through her, trapped in a nightmare she couldn't see. He was bracing for a blow that wasn't coming.

He beats people up for a living, Bo-ram’s voice echoed in her head.

Ha-eun looked at the empty soju bottles, then at the boy cowering against the door. Whoever this guy was, whatever he did in the dark of the city, right now, he is just a terrified kid trapped in a cage of his own memories.

She quietly folded her dripping umbrella and set it against the wall. She didn't run into her apartment. Instead, she took a slow, deliberate step forward.

"Hey," she said. Her voice was barely above a whisper, soft and incredibly steady.

Do-jin flinched again, pressing the heel of his hand hard against his right eye. He let out a ragged, agonising breath. "Mom... I'm sorry. It hurts. It just... it really hurts today."

The words hit Ha-eun like a physical blow. The absolute heartbreak in his raspy voice stripped away any lingering fear she had of him. Today wasn't just a random Tuesday. It was an anniversary. A bad one.

She slowly lowered herself into a crouch a few feet away from him, making sure she was at his eye level, not towering over him.

"You're safe," Ha-eun said gently, keeping her distance so he wouldn't feel trapped. "Nobody is going to hurt you here."

Do-jin blinked heavily, fighting through the haze of cheap alcohol and overwhelming grief. He slowly lowered his arm. His dark eyes, red-rimmed and swimming with unshed tears, finally focused on her. He recognised the white cardigan. He recognised the warm, steady voice from the convenience store.

The realisation that someone was witnessing him like this—broken, crying, pathetic—sent a new wave of panic through his chest. He looked away, his jaw clenching, shame burning hotter than the alcohol in his veins.

"Go away," he rasped, his voice rough and defensive. He turned his face toward the doorframe, hiding his tears. "Just... don't look at me."

Ha-eun didn't move to comfort him physically. She knew better than to touch a stray dog when it was backed into a corner.

Instead, she stood up silently. She keyed into Room 301. The apartment was pitch black; Bo-ram and Ji-yoon were fast asleep, their snores faintly audible from the bedroom.

Ha-eun slipped off her wet shoes, walked into the kitchen, and opened the fridge. She grabbed a cold bottle of honey-water—Ji-yoon’s favourite hangover cure and a small, packaged red bean bun. She walked into the living room, grabbed a soft, fleece blanket off the back of the mustard-yellow sofa, and stepped back out into the cold hallway.

Do-jin hadn't moved. He was still pressed against his door, staring blankly at the floor.

Ha-eun walked over. She didn't say a word. She simply set the bottle of honey-water and the red bean bun on the floor near his shoes. Then, with a gentle, careful movement, she draped the warm fleece blanket over his shivering shoulders.

Do-jin stiffened as the fabric settled over him. It smelled like fabric softener and something faintly floral. It was the warmest thing he had felt in a decade.

He looked up at her, utterly bewildered. The harsh lines of his bruised face softened into pure confusion. Why wasn't she disgusted? Why wasn't she running away?

Ha-eun offered him a small, quiet smile. "The concrete is cold," she said.

She walked back into Room 301, and quietly closed the door.

Out in the dimly lit stairwell, Do-jin sat alone. He pulled the fleece blanket tighter around his shoulders, staring at the honey-water and the red bean bun. For the first time since his mother died, the tears that fell down his face weren't entirely from the pain.

He leaned his head back against the door, closing his eyes, wrapped in the quiet warmth of a stranger's kindness.