"See, I told you I could steal that guy's muscles," I said, flexing my biceps. My friend Billy stood there, his mouth hanging open in disbelief. "How does that even work?" he asked, prodding my arm.

"I don't know, man, I just think about it and it happens. That's why I'm super buff and that former bodybuilder is skinny," I said, puffing my chest out.

"Would it- well, would it work on me?" Billy asked, looking at his own scrawny arms. I grinned, "Let's find out!"

We walked across the street to the gym, and I concentrated on Billy. I felt the energy drain from me as Billy's muscles began to grow.

"Whoa," Billy exclaimed, flexing his newly acquired muscles. "This is unbelievable!" He looked at me and saw my weakened state. "Are you okay?" he asked, concerned.

"Yeah, I'm fine. Just a little drained," I said, staggering a bit. "It's worth it though, seeing you all buffed up." I grinned at him.

Billy was overjoyed. He couldn't believe his new physique. But soon, the novelty wore off and he looked worried. "How long will this last?" he asked.

"Not sure, buddy," I replied. "But we should probably find out more about this power of mine. Let's go to the library."

We spent hours at the library, pouring over books about supernatural powers. Nothing seemed to match my ability. Billy looked at me, "Maybe you're unique."

"Yeah, maybe," I said, unsure. "But I don't want to hurt anyone with this power. I need to control it better." Billy nodded, understanding my concerns.

The next day, I tried stealing muscles from a mannequin in a clothing store. Nothing happened. "It seems like it only works on living beings," I observed.

Billy suggested we try it on animals. We went to a local farm and I tried to steal muscles from a cow. Surprisingly, it worked!

"Well, that's a relief," I said, flexing my arm. "At least I won't have to steal from people." Billy laughed, "You could become a superhero, man!"

The idea stuck. I decided to help people, using my power responsibly. I stole muscles from livestock, leaving enough to not harm them, and gave it to people in need.

Soon, I was known as "The Muscle Thief." People came to me with requests. From elderly folk who wanted to walk without support, to young athletes seeking strength.

Billy became my sidekick, helping me manage the requests and taking care of the animals I borrowed strength from. We became a team, a force for good.

Our popularity grew, and so did the demand. But we never lost sight of our main goal - to help without causing harm. We worked hard, day and night.

One day, a scientist approached us. He wanted to study my ability, promising it could lead to breakthroughs in muscle degeneration treatments. I agreed, hoping to do more good.

The scientist's studies were a success. They developed a treatment that mimicked my power, helping countless people. I felt proud. My strange ability was making a real difference.

After that, I retired as "The Muscle Thief". I didn't need to steal muscles anymore, the treatment did that. But I kept my power, just in case.

Billy and I went back to our normal lives, but we weren't the same. We'd seen the power of helping others and it changed us. We decided to continue in that spirit.

We started a non-profit organization, using the funds we'd received from the scientist's research to help those in need. It was fulfilling work, and we loved it.

My power was a mystery, but it led us on an incredible journey. We learned the importance of helping others and made a difference in people's lives. And in the end, that was what mattered most.

We often looked back at our adventure as "The Muscle Thief" and his sidekick. We laughed at the absurdity of it all, but were grateful for the opportunity it provided.

As for my power, it remained with me. I never used it again, but it served as a constant reminder of our journey and the good we achieved. And that was enough for me.