A Tree, For Us (Sans X Reader)

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Your P.O.V.

I was speechless -who can cut an enormous pine and leave no trail?? This is wrong!! (A) calm down...- I looked at Grillbz and Sans, they both were shocked. I saw a small deep blue and yellow light on Sans' skull, I don't think he's crying, but I wouldn't blame him... that's a very special tree for him. I walked a little making Grillbz startled, but he walked with me to Sans' side. Now that his face was clearly seen, I saw that he wasn't crying, his eye was flaming. Temmie tried to flee from Sans' grip, wiggling and crying, but he didn't seem to hear. I touched his shoulder making spin around so wildly I almost fell along with Grillbz. "A-are y-you okay, S-Sans?" I asked him.

"where's papyrus?!" he asked, in a very angry tone.

"S-Sans- "he cut me off.

"where's my brother?!" he snapped.

"Hey, Sans calm down. He's probably at Undyne's place" Grillbz said. Sans growled and turned around. "At least stop hurting Temmie" he added pointing to Temmie, who was still wiggling to free from his tight grip. He dropped Temmie on the cold snow, he came running with me and jumped on top of my head.

I heard heavy footsteps behind us, I froze in place... I knew who it was. "You!" they yelled "Have you seen the human that killed- "the voice suddenly stopped. And something landed on my side, I turned my gaze towards it, and a blue spear was stuck on the ground. Grillbz had the we-are-screwed look, while Sans glared daggers at Undyne. "Hand the human you punks! It has to pay for every life it took away!!" she stomped at the snow, and walked in threatening manner.

"and what if we don't?" Sans snapped.

"Then" she snapped, and a bunch or royal guards surrounded us, mostly dogs. "Give us the human! Or you'll force us to make this harder for you!" she yelled. The dogs snarled and growled at me, well except one, one was looking everywhere, like if he was looking for me.

Sans just gave them a lazy look and shrugged his shoulders "nah, i'm cool" he simply stated.

Undyne growled and yelled "Ngaaaaaaaaahhh, attack them!" she summoned a spear wall and the dogs lunged for us, I felt in gravity-zero and appeared at Sans wrecked living room.

"(y/n), grillbz, tem... go as far as possible. right now, run!" Sans said to us and leaved.

"Sans! Wait!" I yelled back. I looked everywhere, and sat Grillbz at a chair then I handed him Temmie. I runned upstairs and grabbed some blankets from Sans' room, I runned again down stairs tripping at the end of them.

"Are you okay?" Grillbz asked concerned. I nodded and jumped up back again, I covered Grillbz and Temmie with them.

"Stay here! I'll be back for you later!" I said rushing to the door.

"Be careful, (Y/N)!" Grillbz yelled back. I closed the door behind me and runned as fast as I could to where the pine was. Undyne and the dogs tried to hit Sans. But not a single blow landed on him. He threw them several time to the snow, and threw bones at them. I runned towards them, I accidentally stumbled in front of Sans. He had his hand up to my direction, but he stopped when he saw me. Then the world turned black and white around me. I saw Undyne's soul, like the rest of the monsters, the difference is that hers have a small tint of red. Sans soul as well, his had a tint of yellow. -weird... I thought his was blue- and now mine changed between, red, cyan, and green. And the black spots were partially smaller.

"i said to run away, not run towards your death!" he snapped at me. When he finished a spear barely missed my head. "see? run now!" he said again, throwing more dogs away.

"No! I'll help!" I replied. Another spear came toward us, but Sans pushed me out of the way. The spear landed besides me, I took it ready to fight back. Undyne threw more spears at me. I blocked them with mine, then Sans fired at her with a blaster. "Undyne! I didn't kill anybody!" I said to her. She didn't listen, and lunged towards me, I dodged. But she tried to slice me again with it, I crouched, barely avoiding the hit.

"(y/n) run... please!" Sans said. Undyne threw more spears at me, and I gain I used mine to block them, I missed one of them. It sliced part of my arm making my HP fall again. HP 15/20.

"Undyne! I didn't kill anybody!" I yelled at her again.

"How do I know that you aren't lying!? Come here little brat!" blue dots appeared on the ground surrounding me, I jumped out of the circle just in time. Spears appeared from the dots firing up.

"I don't have dust on me!" I replied. Dodging her next attack.

"You wash it away!! I saw you at waterfall! You're a dirty liar!!" she snapped, and threw more and more spears. Sans fired a blaster at her and threw several bones at the dogs, they got busy chewing them. "Stop resisting! Give up on your soul, or I'll tear it from your bloody body, right here, right now!" Then Undyne surrounded me with a circle of spears, which came closer, and closer, making the circle smaller at the time. I jumped out of the range of the spears, Undyne made more and more, faster and with smaller holes. Two of them hit me. HP 5/20.

"Sans was with me the whole time!! We have plenty of witnesses!! Please, stop!!" I begged her. She didn't look convinced at all.

She glared at Sans "Then, I suppose that you are a dirty traitor!!" she summoned a big spear and threw it to Sans, he dodged again.

"okay, undyne. what about if you check on her LOVE?" Sans said. She growled and grabbed my neck of my shirt and held me high to her face. Letters came from my soul.

LV 1 EXP 0.

"What?? That's not possible... you stole a clean soul and used it to hide your sins!! You're the worst little shit I've seen!! Now I'll kill you!!" she made a pear on her hand and rise it above my head. "Ngaaaaaaaahhhhh" she shouted and swung her spear mercilessly. HP 1/20. "What?!?! Why don't you just die!??!?!" she dropped me to the ground. I held my side tightly and crawled weakly away from her. Sans runned towards me, and he just held my head. I had that feeling of gravity-zero again, and appeared again at the living room of the Font brothers' house.

"HoMan!" Temmie squealed and jumped on top of my back, making me fall again to the floor.

"i told you to run away... she doesn't listen to humans." Sans said with a sad tone.

"A-are you... okay?" I asked Sans.

"if i'm okay? i'm the one who should be making that question" she said. He sighed "we have to go now, or else she is going find us" Grillbz rested his hand on Sans shoulder, while Temmie sat at his lap. Sans held my head again, on his lap. He snapped his fingers, and again I felt that odd feeling. I opened my eyes and saw that we were now at a lab.

Some footsteps echoed at the distance, getting louder.

"O-oh!"