DETERMINATION

Dark, Darker, Yet Darker.

Y/N has won. The battle was over. Undyne's corpse laid out on the concrete, her metal armor damaged beyond repair, a puddle of blood gathering underneath her.

Suddenly, Y/N stumbled over, falling to his knees. He felt his stomach turning. Suddenly, his eyes widened as he felt bile rising up in his throat. He put his hand over his mouth, trying his best not to vomit, when suddenly, thick liquid expelled from his mouth, black as tar, foul-taste left behind in his mouth.

Flowey's eyes widened as he immediately rushed over to Y/N, placing a vine on his brother's shoulder for support. "Woah! You okay, Y/N?" Flowey asked, wiping the liquid off of Y/N's face with a leaf. "You sure went crazy back there. I've never seen you fight like that." Flowey said, he has seen your ruthlessness dozens of times, but never like that. It was definitely odd, to say the least.

Y/N tried not to gag, the taste of the black liquid not leaving his mouth. "I... I don't know what came over me." He barely mumbled out. "It... didn't feel like me. I didn't feel in control of my own actions. Like my body moved on its own." Y/N said, his tone uncertain and unsteady.

Flowey hummed in response, unsure of what to say to that. "We should get going. If what Undyne said is true, there's bound to be dozens of heroes and cops gathered here soon. Can you stand?" Flowey asked, ready to support him if he couldn't.

Y/N POV

I tried to stand up, feeling my legs wobbling, my knees weak. Thankfully, Flowey caught me with his vines before I could fall over. "Thanks..." I grumbled, leaning on the vines for support in order to stand up. "Let's get going, All for One won't be happy with me, we'll need another place to stay for tonight." I said.

Flowey nodded. "Where though? It's not like we have many allies to rely on besides each other. I don't know any other associates of the old man who could help us without ratting us out." Flowey stated.

I shook my head. "I do. It's about time you met our third brother, Flowey." I said, starting to walk out of the alleyway, making sure to keep watch for any heroes or cops nearby.

Flowey's confusion was very much visible, but he didn't ask questions. He climbed back up on my shoulder, using his vines to make sure I don't fall while walking.

We walked for about half an hour before finally reaching our destination.

"...a bar?" Flowey asked, clearly confused. "Since when do you go to bars? And more importantly, what is our supposed 'third brother' doing in a place like this?" Flowey asked

"Shut up. I need you to trust me, Flowey." I said before knocking on the door in a specific sequence.

There was silence for a moment before the door finally opened. Revealing a tall figure, wearing a suit and... made of mist?

"Y/N? What are you doing here?" The mist asked, its yellow eyes glancing around the alley. Judging by the voice, it was clear that whatever this thing was, it was male.

"Hey, Kurogiri. Things went a bit badly with All for One, I need a place to stay for a few days while the situation cools down. Is Shiggy around?" I asked, placing my hand on the doorway.

Kurogiri nodded, moving aside to let me in. "I see, and yes. He is inside. Come in." Kurogiri said

I nodded and thanked him, walking into the bar, revealing a boy about my age, with pale blue hair and covered in hands, wearing a simple black sweater and jeans.