Chapter Text
It was midnight when Sam, laying in his bed scrolling through social media, received a text from his best friend, Sebastian. “Come over, I found smth you’re gonna like.” They’d been friends for as long as Sam could remember, and that was all the convincing it took the blond-haired boy to throw on a sweatshirt and pants and sneak out his window to his friend’s house.
This wasn’t the first time Sam had done this, far from it, so he was well-accustomed to the walk up to Sebastian’s house. 15 minutes and one opened window later and Sam was standing in his friend’s room. Upon his arrival, Sebastian jumped up from his bed holding two unmarked bottles. “Guess what I found in Maru’s room,” he said with a smirk, holding out a bottle to Sam.
“Fuck yeah man! What’s in it?” Sam asked, taking the bottle from his purple-haired friend.
“No clue,” he replied with a chuckle. “But there’s only one way to find out. On three?” Sebastian held up the bottle like a toast.
“Alright,” Sam accepted, clanking his bottle against Sebastian’s. “Loser has to tell your sister?”
“Deal. Whenever you’re ready,” Sebastian said, preparing himself for the contest.
“Three,” Sam started.
“Two,” Sebastian continued.
Together they ended the count. “One!” They brought the bottles to their lips and started drinking. The drink had an almost sickeningly sweet strawberry taste, and Sebastian nearly choked on it, leaving his taller friend to win the contest by a couple seconds. Well, formerly taller friend, as no sooner had the drink touched Sam’s lips than he started changing. Immediately, he began to shrink, dropping a full 3 inches by the time he finished drinking. At the same time, his hair began to grow, falling past his shoulders and down his back, thickening as it did. The still-shrinking boy let out a loud belch and held his glass up, declaring victory.
“Suck it Seb!” he slurred, his voice cracking on the other boy’s name. “Where’d Maru get these? They’re great!” he continued, eyes widening as the voice that came out of his mouth was not his, but was much higher and more feminine. “What the fuck?” he asked, not noticing the now half a foot of height he had lost. His question went unanswered except by a sudden weight on his chest cause by the rapid growth of boobs, swelling from a to d cups in a matter of seconds, causing Sam to stumble forward. Face first into the now sizable bust of his friend.
Sebastian had finished drinking at this point, and had seen a fair few changes himself. He shrunk a decent bit, although not nearly as much as his friend, who he now had a good 8 inches on. His purple hair had thickened and grown out past his shoulders, falling over his right eye and stopping just above his chest, which had grown as well, though not nearly as much as the girl whose face was currently buried in them.
Sam’s first reaction to falling into her friend’s new tits was to melt into them, her mind instantly filled with thoughts of their softness and how good they would feel to cuddle against as their owner methodically stroked her long hair…
Her second reaction was to push off the now taller girl, stabilizing herself on the table behind her and assessing her new situation. A quick feel around brought her to the conclusion that she had most been dreading: she was a full blown girl. “Fuck,” she muttered, running her hand through her hair.
“Figured it out yet, hot stuff?” Sebastian smiled, brushing a lock of hair out of her face as she walked up to her friend.
“Hot stuff?” Sam replied indignantly, noticing the taller girl staring unashamedly at her chest and trying her best to hide them with her arms.
“Hey, don’t blame me for admiring my friend. If anything, you should take it as a compliment.”
“As if,” she pouted, turning around to face the wall.
Sebastian’s voice softened. “I’m sorry, I was taken by surprise, just like you.” She sat on the table next to her blonde-haired friend, wrapping an arm around her. “I won’t do that again, okay? Now, do you want the floor or the bed?”
“What?”
“Do you want the floor or the bed? Unless, of course, you want to walk back to your house wearing those,” Sebastian explained, highlighting the way that Sam was fighting to keep her clothes from slipping off her body.
Sam stiffened for a moment before leaning onto her friend. “With this happening,” she gestured to herself, “I’m sure we can both fit in your bed.”
“If you’re okay with it, I am too.” Sebastian replied, standing up and climbing into her bed, leaving half the bed for Sam to join her.
And that was how, when Sebastian’s alarm woke her up in the morning, she found herself cuddling with her friend. Quickly extricating herself from the sleeping girl, she lightly shook her. “Good morning sleepyhead.”
Sam yawned and stretched her arms, looking at the purple-haired girl who she woke up next to and smiling sleepily. “Morning, cutie.”
Sebastian blushed bright red, quickly standing up and yelping as her now ill-fitting pants nearly fell off her body. “Shit,” she swore as she rifled through her closet for something smaller to put on. Nothing. “Sam, do you want to come and steal clothes from my sister with me?”
Sam nodded, rolling out of bed and trudging over to the door. “Let’s go.”