Lindsey, her outgoing friend.

Jane called her friend Lindsey. She'd always been one of her most energetic and playful friends, so she was sure to have a fun time with her around.

"Jane? Hey! It's been so long!" Lindsey said.
"It's been a week, Linds. Hey, uh... I have something fun to try. I found this spellbook at the library... wanna see if it does anything?"
"A spellbook, huh? What for?"
"You'll see when you get here. Hurry up, I'm bored!"
"I'll be there in a few minutes! Don't you worry, J."

As Jane waited for Lindsey, she paced around her house. Thinking it'd be nice to offer, she went to the kitchen and filled a glass of water for her, leaving it on the counter. Just as she was walking back, the doorbell rang. She smiled and ran to it.

Standing right before her was her red-headed friend, Lindsey, towering over Jane at 5 feet 10 inches. Before she could barely comprehend her friend's existence, though, Lindsey rushed in with a huge hug, greeting Jane warmly.

"J! How're you doing?" She asked, squeezing her shorter friend.
Jane giggled, returning the hug. She wasn't as strong as Lindsey, but she did her best, pulling her chin up to Lindsey's shoulder.
"So, what's this spellbook you said you had?" Lindsey asked, pulling back. Jane's chin was left hanging, but she looked back up to her friend.
"I found it at the library. It's got all these weird... spells, I think? I don't even know how to say half of them..."
"Come on. Where is it? I wanna see it."
"Hold on! I got you a water before you came."
"Ah, nice... thanks." Lindsey grabbed her water as she followed Jane to the spellbook, currently sitting closed on the coffee table in the living room.

With that, Lindsey began to read.
"'The users shall be disrobed for the best operation of this literature; the ignorance of this fact shall be conceded by the failure of any spells henceforth mentioned, whereby it shall function wrongly or not at all.'" Lindsey read. "Geez, who wrote this? George Washington? What does half of this mean?"
Jane read the passage again, thoughtfully. "I... I think it means we've gotta go naked."
"Naked? Oh no, what am I gonna do, now that you're gonna have to see my tits?" Lindsey joked. "Outside of the many times you've walked in on me undressing on our sleepovers?"
"Oh, shut up and get your tits out." Jane joked, already feeling more outgoing in Lindsey's presence. She lifted her shirt and undid her bra, throwing them both on the single-seated chair beside the couch. Soon, her pants and panties were there, too.
Even though Jane started first, Lindsey finished undressing at the same time as her, seemingly excited to start.

"So. Now we're nude, and you're showing your wonderful tits for the world." Lindsey joked. "Let's get this party started!"
She leaned back over the book, flipping a few pages until the spells start, skipping a few pages of useful instruction.
"So, Linds... what do you wanna try first?" Jane asked.