(Y/N) absorbed a monster soul when she was little, gaining skeleton powers. Many years later, (Y/N) and her sister Frisk fall into the underground, meeting Toriel, their new mother, Papy, Undyne, and of course Sans. Will (Y/N) and Sans finally reali...
I was sitting on my post, about to fall asleep, when I heard a distant cry for help. I looked around, confused, when I realized who it was. (Y/N)!! I teleported to where the cry came from, and I saw (Y/N) with a burnt leg on the ground, cowering in fear. I then saw Asgore towering over her, trident in hand, aiming it at (Y/N)'s head. I clenched my fist and felt my eye flare blue in anger.
I grabbed Asgore's soul and flung him to the wall. He looked at me, and yelled "What are you doing? This is that last human soul we need!". "Your not going to kill (Y/N) on my watch" I responded. Asgore then sent a flurry of fireballs at me. I tried to dodge them, but I kept getting hit in the chest. I fell to the floor in pain as I tried to heal myself.
I then saw Papyrus, Frisk, and Undyne running towards me. "BROTHER! ARE YOU OK?!" Papyrus exclaimed, sitting down next to me and beginning to heal me. I looked over at (Y/N) and back at Undyne, signaling for her to help (Y/N). She nodded at me and summoned a spear and looked over at (Y/N) and Asgore. Then, she gasped and stepped back. I glanced over at (Y/N), and also gasped.
There were (F/C) particles circling around (Y/N), covering her. After the particles cleared, I saw (Y/N)...but it wasn't her. She had dark red horns and both her eyes were (F/C). Her (H/C) hair had geryish-white tips (and if your hair color is white or grey you have black tips =P) and she had a tail...but it was a skeleton tail.
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(This is what you look like but with your (H/L) (H/C) hair and (F/C) eyes so lol X3)
She was glaring straight at Asgore, anger showing in her face. Asgore raised his trident and slashed it at her. I heard a clang and saw (Y/N) had raised a wall of bones in defense. She grabbed Asgore's soul and threw him up in the air, then slammed him down on the floor. At this time, Papyrus healed me and I stood up and ran towards (Y/N).
She had three Gaster Blasters behind her and was aiming it at Asgore. "(Y/N) Stop!!" I yelled at her. She whipped her head at my direction, the anger vanishing from her face the second her eyes interlocked with mine. Her eyes turned back to (E/C) and she looked over at Asgore on the ground. Her hands began to shake as the Gaster Blasters behind her vanished.
(F/C) tears sprang to her eyes as she ran into the Waterfall forest. "(Y/N)!" I yelled, running after her. I didn't care about Asgore, I only cared about (Y/N). I felt myself grow tired, but I shook my head and ran faster. I stopped quickly when I saw (Y/N) standing near the river. I felt myself walk closer to her, and I mentally screamed at myself to stop.
"W-why did you follow me sans?" I heard her ask through sobs. I continued to walk towards her and she turned around and looked at me. (F/C) tears were streaming down her cheeks as she stepped back as I approached. "Aren't you gonna say anything?!" (Y/N) screamed at me, falling onto her knees and hugging herself. I stood in front of her and sat down. I grabbed her cheek and lifted her head to look at me.
She looked at me, confused, tears running down her face. I smiled at her and said "Because I care about you (Y/N)". Her cheeks began to turn pink as her big, (E/C) eyes interlocked with my eyesockets. I pulled her face closer to mine, and she said "Sans? What are you doing?". I then pressed my teeth against her lips, and I heard her gasp slightly.
After about 30 seconds, I let go and saw her face was bright (F/C), and her form vanished. I felt my face heat up and I stammered "I-I'm sorry (Y-Y/N) I s-shouldn't have done t-that I'm sorry-". I was cut off by (Y/N) giving me a quick kiss on the teeth and hugged me. I froze but then hugged her back. "I love you (Y/N)" I mumbled.
"I love you too Sans" I heard (Y/N) respond as she hugged me tighter.
