"Biggest Fan"
Blaine grinned mischievously as he crept into his older brother's room, taking advantage of his opportunity while Cooper was at school. He knew Cooper would get mad at him if he caught him, so he always ran in there for a little bit after morning kindergarten, leaving plenty of time before Cooper got home.
His eyes set on the guitar in the corner and he giggled happily before picking it up and climbing onto Cooper's tall bed. He sat with the guitar leaning against his folded knees, putting his hands on the strings like he always watched Cooper do. He didn't know how to play, not really, but he was observant. He noticed how Cooper put his fingers in a diagonal line across the neck of the guitar, pressing down the strings, and he noticed how he strummed the strings with the pick. But he didn't know where Cooper's pick was, so he used his fingers. When it made a sound that sounded like what Cooper did, he laughed delightedly and did it again. Cooper will be so proud of me, he thought.
He kept trying out different ways to put his fingers, giggling excitedly every time he made a sound that wasn't just noise. He remembered a few chords that he saw Cooper playing and he remembered the song he'd put to them. It took him a while to put each chord together, but he slowly sang along to the two chords.
"You think I'm pretty," he sang loudly, a little off-pitch but he was too young to care about that very much, "without any makeup on."
"Blaine, what are you doing?" Cooper asked from the doorway. Blaine gasped and set the guitar down quickly, hugging his knees and looking up at his older brother.
"I'm sorry, Coop," he said, curling up into himself. He didn't like when Cooper got mad at him. "I was playing a song."
"Blaine, how many times do I have to tell you not to touch my guitar?" Cooper asked, frowning and crossing his arms over his chest.
Blaine felt tears well up in his eyes and his lip wobbled a little as he said, "I'm s-sorry. I saw you playing and I thought you'd be proud of me if I could play like you." A few tears fell and he looked up at his brother with wide eyes. "Please don't be mad."
After a few seconds, any anger Cooper had melted away and he climbed onto his bed, wrapping Blaine up in a hug. "That's okay, Squirt," he said, mussing Blaine's curls lightly. Blaine laughed, relieved, and hugged Cooper tightly. Cooper smiled fondly and picked up the guitar, setting it across both of their laps. "Show me what you can do, Squirt," he said. His heart swelled when he saw the way Blaine's eyes lit up with his grin.
"You're gonna be so proud, Coop!" Blaine promised happily. He set up his fingers on the strings and strummed a few times, looking up at Cooper to see his reaction. He saw Cooper grinning proudly and he squealed in the way only a five-year-old can, launching into a hug. He rested his head against Cooper's chest and grinned when Cooper patted his back.
"You're gonna be a rock star someday, Blaine," Cooper told him. "Just remember who your biggest fan is."