DeathTale: Undertale AU

Frisk sat alone, the weight of the world pressing down on them as they stared at the spot where Flowey had once existed. The memories of Asriel flashed in their mind, his innocent face, his laughter, and the bond they had shared.

I killed Asriel, my best friend...

Frisk's voice trembled in their thoughts. But he was the one who helped the most to kill humans... He is a protector, a betrayer.

Frisk's hands clenched into fists as the memories of the past continued to haunt them. They stood up slowly, wiping away the tears that threatened to fall.

She should be coming now...

A voice suddenly broke through the silence.

"Hey, little one. Are you lost?"

Frisk turned, their heart heavy, and there stood Toriel. Her gentle smile did nothing to ease the pain within them.

Mom... Why...? Why didn't you listen to me... I tried to save you, but you didn't listen and still went to war... Whyyy?

Frisk took slow, deliberate steps toward Toriel, their mind a whirlwind of emotions. With a sudden movement, they embraced her. Toriel's arms wrapped around them, warmth and love radiating from her.

"Are you scared...?" Toriel asked, her voice soft. "You must be... Don't worry, it'll be fine."

Frisk pulled back slightly, their expression unreadable.

Mom... they thought.

Toriel blinked, her smile faltering as she looked at Frisk. "Oh dear, why are you calling me your mom?"

Frisk didn't respond. Instead, they silently summoned a red knife into their hand. With one swift slash, they cut through Toriel's stomach. The sound of tearing flesh echoed in the quiet air as Toriel collapsed, blood spilling from the wound.

She looked at Frisk in confusion, her voice weak.

"Li... little one?"

She pressed her hand to the wound, her breathing shallow.

Frisk stepped closer, their gaze cold, and without a moment's hesitation, they slashed the knife across Toriel's head, silencing her forever.

Toriel's body disintegrated into dust, fading away like all the others before her.

A notification appeared before Frisk.

"Love increased"

"Lv 7"

Frisk didn't stop. They turned, walking toward the gate, the path ahead filled with the bitter taste of destruction. As they walked, every monster that crossed their path met the same fate.

They killed. Again and again, they kept killing.

---

After a while, Frisk found themselves standing in the snowy woods of Snowdin. A notification appeared in front of them.

"Love increased"

"Lv 12"

A voice echoed in the distance.

"Human..."

Frisk slowly turned, their heart racing as they saw a figure standing on a bridge. It was Sans