Kenma x reader (lemon)

Little Backstory

Y/N p.o.v. (5 year olds)
Me and my best friend, Kenma Kozume, we're at my house playing together.
(IDK YALL CAN DECIDE WHAT YOU ARE PLAYING WITH HIM)
Kenma stopped what he was doing and glanced over at you.
"Y/N?"
I gave him a long stare and said, "uh-huh?"
He then responded with, "I wonder... how long we'll be friends for..."
I didn't think too much of it and said, "FOREVER!!"
I had the biggest smile on my face, Kenma even had a little smile. Kenma trusted me when I said that.