//Hehe, get the reference in the title??//
(First Person P.O.V (M/n))
"Straight your back!"
"This is not ballet, Bill!"
"Whatever! Do you want to cramp up while doing telekinesis?"
I grumbled something under my breath as I stood straight. Seriously, just because he was my mentor doesn't mean he gets to just order me around. But still, if I did cramp up while I was trying to lift something up, I'd probably be in pain for a few hours. Stupid sensitive body.
Bill sighed and pinched the bridge of his nose. "Well, that's a bit of an improvement. Alright, lift that giant rock." He said as he jabbed a thumb over to a gigantic boulder.
I walked closer to the boulder and thrusted my hand towards it. My hand and the boulder were surrounded in a blue aura as I struggled to make it levitate. Jeez, how heavy was this rock?
Eventually, it got the better of me and I dropped to the ground, panting. I never actually thought I'd be worn out using demonic powers. I've always thought you'd just be able to use it anytime. But sadly, that wasn't true.
Bill went over to me and placed a hand on my back. "You okay?" He asked as if I wasn't straining myself from this work.
"Do I look like I'm okay? Bill, we should stop for the night. I'm really dying to sleep right now." I begged, turning my towards him. I really needed my dearly needed sleep. My bed was waiting for me. It must be dying for me to lay on it, missing its owner.
Bill looked at me as if I was joking. "Look kid, No can do. You gotta earn to be my apprentice." He said, connecting his fingers together.
I groaned. There has to be someway he can let me off the hook. I thought of different ways on how to persuade him to let me rest. I finally got an idea. I forced myself to lay on my back and looked at him, giving him a puppy look. It always worked on Dad. So why not him?
For a while, he struggled not to grin. But in the end, he smiled and sighed, facepalming. "Alright fine."
"YES!" I cheered before a sharp pain shot through my body. I hissed at the pain. Well then, only one way out of this.
"Bill, carry me." I said, completely poker-faced. Bill's face suddenly turned red as he protested. "WHAT?! Just what the heck are you thinking?" He said, his face almost burning from that intense blush.
I didn't know why he was blushing. Maybe it's from embarrassment, I don't know. Bill sighed as he crouched to me and carried me bridal-style. I may have squealed a bit from the sudden surprise.
"Wow, you're surprisingly light even when you eat 5 bags of potato chips. Not to mention, you have pretty chubby cheeks. Especially when you pout." He said, smirking.
I felt my face heat up as I covered it with my hands. How dare he say my cheeks were chubby! I almost melted in his arms from embarrassment. "S-Shut up, you idiotic demon!!" I yelled.
The moon watched us as we argued throughout the forest. In case you didn't know, Bill had declared that we continue our training at night. Leading to me being exhausted by morning. Honestly, could he pick a better time to train?
We arrived at the front of my house. Bill levitated us to my window and set me down on my bed gently. He looked at my closet weirdly. "Hey, do you have any clothes that could fit me?" He asked suddenly.
I was confused. "Uhm, I don't know. But I think I have some clothes that are too big for me. I kinda preferred having baggy clothes. Wait. Why are you suddenly considering this- OH MY GOD!" I quickly covered my eyes as he began to strip right in front of me.

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Bill's Apprentice//Male!Reader Insert
FanfictionIt has been four years ever since Bill's defeat and disappearance, restoring Gravity Falls' place as the weird old town in Oregon. (M/n), a young boy in the age of sixteen, moves into Gravity Falls with his father. As he encounters new friends, he a...