The Heroine is My Stepsister, and I'm her Final Boss-Chapter 406 - 404: You’re Not Whole

It was dark—night time, truly night, in a way the Fourth Layer seemed to specialize in. A darkness that didn't merely settle over the snow, but pressed into it, pushed down, seeped in like ink spilled into white cloth.

The only source of light across the damn endless snowy lane was the snow-made mansion crouched in the far corner like some strange frozen beast pretending to sleep.

Inside, it felt warm. Outside, it was hell's idea of winter.

The cold weather beyond the shields was a creature of its own—alive, whispering, watching. It prowled the endless white dunes, swirling with hunger. And the monsters that lurked in it… they came to the light.

They always did. The brightness of the mansion, the glow of Merlin's crafted ice walls, Aurora's layered barriers, and Michael's final holy shield—it called to them.

Unknown beings crept forward, their shapes nothing like anything from the human plane. The wind would shift, and a hunched silhouette would flicker. Some had dozens of mouths, wet and clicking.

Some had tentacles that dragged slow, heavy trails in the snow. Others had no body at all—only a shadowy form that shivered like tar disturbed by breath.

But every single one of them burned the moment they touched the layered shields.

A hiss. A flash of blue-white fire. A shriek that faded into a whimper.

Then gone.

Not even a tiny insect passed through the barriers. It was not allowed.

Inside the warmth, the hallways made of molded snow echoed softly with footsteps. The air smelled faintly of water, cold stone, and the lingering mana Merlin had woven into every wall.

Aurora walked through those halls, her footsteps fast, impatient. Her cloak dragged lightly behind her, brushing the floor. Her irritation was sharp enough that even the warm air seemed to crackle around her.

"Atlas?" she called, voice echoing off the small arches. "Atlas, where are you?"

No answer.

She clicked her tongue and called again—louder this time, sounding less like a calm elder mage and more like an annoyed older sister searching for a runaway younger brother.

Still no answer.

She turned sharply and poked her head into the library, then the storage room, then the front hall—nothing. Her brows twitched.

She found Michael sitting cross-legged in the corner room with Raphael beside him. The two angels looked like statues carved of patience and piety. The copy of the Book of Acclaim floated slightly above Michael's palms, pages flipping with soft rustles as Raphael whispered prayers under his breath.

Aurora crossed her arms. "Michael. Do you know where your precious prophet went?"

Michael didn't look up. His voice was annoyingly serene.

"The wisdom of the chosen," he murmured, "has many paths that even I cannot see."

Aurora scoffed, throwing her hands in the air. "So that means you don't know."

Raphael's soft prayer briefly stuttered, probably because even he found her frustration ridiculous.

Aurora spun on her heel. "He better not be—"

She headed straight to the girls' room with the look of someone about to scold a child caught doing something improper.

Inside, Eli lay on the bed with Claire and Lara sitting on either side of her. All three were laughing softly. Claire's hand rested over Eli's pregnant belly, feeling the faintest kick. Lara pressed her ear down, her blue hair falling like curtains as she whispered guesses about the baby's gender and name.

The warmth in the room was thick—gentle, domestic, fragile. Even Aurora paused a moment, watching the peaceful scene before clearing her throat.

The three jumped slightly.

"Where's Atlas?"

Silence.

Claire blinked twice. Lara sat up straighter. Eli's eyes widened just a fraction—and that fraction was enough.

Aurora narrowed her eyes. "Oh gods. You know."

Eli looked away, biting her lip.

Aurora dragged her hands down her face. "Not again."

Not again, indeed.

Eli didn't speak. She didn't have to. The guilt on her face was answer enough.

Aurora groaned. "He slipped past the shields, didn't he?"

Silence was the confirmation.

Aurora muttered something extremely unholy for a holy mage, spun around, and stormed out.

But by then—

Atlas was long gone.

.

.

.

The Snow Beyond

Beyond the warmth, beyond the mansion, beyond the shielded walls that kept monsters at bay—Atlas walked alone.

His boots sank into snow with soft crunches, each step sinking nearly to his ankles. The wind screamed around him, pulling at his cloak, trying to push him off balance. But it didn't affect him. Not even slightly. His mana—or perhaps the curse—kept the cold from biting into his bones.

He gripped the letter in his hand so tightly the paper crumpled, edges digging into his palm.

Why now…? Why call me now?

The wind howled in answer.

He walked toward the one place visible in the suffocating storm. The only place where moonlight broke through thick swirling clouds—an impossible column of pale light descending from the heavens like a spotlight from some unseen god.

At the center of that light stood a single Sakura tree.

Pink blossoms. Soft petals. A trunk that looked alive with age.

A Sakura tree in the Fourth Layer of Hell.

The sight always made Atlas uneasy. It felt wrong. Wrong in a way that tugged at the soul. Wrong in a way that echoed memories he didn't fully possess—but felt.

His hair whipped in the wind—black strands streaked with frost. His golden eyes glowed faintly in the moonlight.

He stepped into the glowing circle and raised his voice.

"Where are you, Lilith?!"

His voice carried, echoing off nothing and everything at once.

For a moment—nothing.

Then the echo twisted, softened, reshaped itself.

Or perhaps she simply appeared.

She stepped out of the storm like a shadow finally choosing to walk into form. Wearing dark and green—colors she once favored as the queen of Berkimhum. Her hair flowed down her back, the same deep black as his. Her eyes—sharp gold and green—were the same eyes he'd inherited but never wanted to acknowledge.

Lilith smiled the way a mother would smile after centuries without seeing her child.

"Call me mother," she said softly. "I at least deserve that."

Atlas said nothing.

He asked again, quiet but sharp: "Why? Why call me? Did you call me to heal the curse? The curse your sister placed on me?"

Lilith sighed, almost tired. "No. Even I cannot remove the curse she laid. But do not worry—I apprehended her for her foolish trick."

He looked away, jaw clenched. Taming his next words.

She reached forward gently, but he took a step back.

He turned as if to leave, cloak fluttering sharply.

Then her hand touched his arm—light, trembling.

"Son—please wait."

The soft plea stopped him.

Atlas's breath hitched. He didn't like that it hitched. He didn't like that her voice could still affect him, even though he barely had memories of her. He didn't like that part of him—a small traitorous part—responded to the word son as if it meant something.

He turned slowly.

"I know why you called," he said quietly. He forced the word out, despite it feeling foreign on his tongue. "Mother."

Her eyes softened, pain flickering through them.

"But I won't stop my mission. I have things I must do. People I must save. Promises I must keep."

Lilith smiled sadly. "You've always been hard-headed....always,

My precious son."

Her hand rose, cupping his cheek. She brushed her thumb just under his eye, where exhaustion had sunk in deeper lines than a boy his age should ever carry.

"I missed you. Seeing you grown… it hurts. Because I didn't see it happen. And seeing you so tired—so worn—hurts more."

Atlas swallowed hard.

He didn't want to feel anything. Not for her. Not here.

But emotion wasn't something he could simply command away.

"Why?" he whispered.

She didn't answer immediately. Her gaze dropped to the snow beneath their feet, as if searching for words in the shifting frost.

Then—

"Let me have a moment," she whispered. "A motherly moment. It's been centuries… millennia… since I saw you."

Something in her voice cracked.

Atlas's shoulders lowered just slightly.

He gave her silence. It was the only gift he could give.

When he finally spoke, it was quiet.

"In the entry of the Fourth Layer… you told me I was one of many. A broken piece. What did you mean?"

Lilith released his cheek and stepped back, inhaling slowly as though bracing herself.

"Maybe it is time," she said. "You are already strong enough to enter the Fourth Layer. Strong enough to hear this."

She stood straighter, her silhouette framed by moonlight.

"I cannot say much.,,,. But listen carefully, Atlas....my son."

Her voice lowered.

"The you that you are now… is only a small piece of a greater whole."

Atlas froze.

"The Atlas in your past world and the Atlas in this world—they were always the same. Two pieces of the same soul."

He took a single step back.

Resolutely.

Lilith continued softly.

"I simply helped merge those pieces."

Her eyes lifted to the storms above.

"And there are more pieces. Many. Scattered around the world. All fragments of you. All living different lives. All waiting to be made whole. My goal—my burden—is to bring you together."

The storm around them quieted, as if even the wind was listening.

Atlas's breath shook.

"There… are others? Other versions of me? Living… different lives?"

He felt dizzy.

"I don't want that."

He didn't want to accept it.

He didn't want more burdens.

He didn't want more destiny.

But the moment the thought formed—

The curse reacted.

A violent jolt shot through his body, squeezing his heart, folding his ribs inward as if invisible hands twisted them.

He gasped, dropping to one knee as black markings surged under his skin.

Lilith was beside him instantly, kneeling, hands glowing faint green.

"Shh… breathe," she whispered, easing the curse with a gentle spell. "Do not panic. The curse reacts when your destiny , your epic, your story caries more burden.... Remember this."

Her soft mana soothed the violent pulses.

"If something happens to this body," she said gently, "I will take your soul and join it with the other parts—just as I did when you died in your old world...so don't worry my son..."

Atlas shoved her back suddenly, scrambling up to his feet.

"No." His voice trembled with fury. "I won't die. I will live. I'm...I'm

going to be a father."

Lilith's lips softened. "Yes....yes. You are. And that child… makes me a grandmother." Her smile turned almost wistful. "But one way or another, Atlas—"

Her eyes glowed bright.

"You must be whole....."

She snapped her fingers.

The world folded.

The snowstorm swallowed him—and spat him out.

Just like that—he stood in front of the mansion, the barriers humming gently around it, the warmth reaching him like hands pulling him back into reality.

But his mind wasn't here.

His heart wasn't steady.

"...whole, huh...."