Without another word, Kevin pulled his trunks and pants down, revealing his pointy sword he got from looking at the slime girl's figure.
The liquid girl's eyes widened and she fumbled back with a gasp, shocked at the sudden action. "W-wha?!"
Kevin eyed her seriously, a small glint appeared in his eyes. "Quickly! Get into my cock!"
The slime girl put her hands over her mouth, blushing heavily and was wondering what she should do. She was taken aback at how serious he was about this!
"C-can't y-you hide me s-somewhere-"
"I think the girl went this way! Let's get her!" a muffled voice called from outside. The girl squeaked apparently seeing that there wasn't time for negotiations. She closed her eyes tightly and willed herself to thin out, easily escaping her clothes.
Going head first, she plunged into the tip of Kevin's mushroom causing it to involuntarily twitch. The boy's head lurched back and he cringed a bit as he felt the unknown slime girl fill his cock and balls. It was painful at first, but it quickly became a rollercoaster of pleasure. The entire liquid body of her being finally finished hiding, expanding his cock and balls tremendously but not so much that he wouldn't be able to hide it when he put on his underwear and pants. It seemed she was kind enough to compress herself as much as possible or else Kevin knew he'd need a lot bigger pants and it would become obvious to the guys who was chasing her.
Quickly, knowing it was not the time to enjoy the feeling of the slime girl squirming in the inside of your cock and balls...well, it as difficult to ignore it, but Kevin mustered his willpower knowing the girl had involuntarily trusted him to hide and protect her. He shakily took up his underwear and pants and lifted them up. He noticed that his expanded cock would stick out of his pants a little, but hopefully wouldn't be noticeable when he sat down.
"Hrm...it...it's so sticky in here..." Kevin heard the muffled voice of the girl from his crotch area.
He quickly hushed, hearing her chasers coming. He leaned back as he sat and tried to act casual.
The door opened and there were several...thugs, it appeared...coming in. One of the brutes took notice of Kevin and growled.
"Hey you! Have you seen a slime bitch anywhere?" he demanded loudly.
Kevin remained compose and hoped that these guys wouldn't stick around for long. He looked behind him where the edge of the roof was and stuck a thumb in that direction.
"Yeah, I saw her jump down the roof and fled," he lied.
The thugs widened their eyes and the apparent leader of them spoke.
"That crazy bitch! She's good as dead!"
Kevin could only stare blankly at them. Were these guys stupid or something? She was a slime girl! Even if she fell, she'd be perfectly safe. He wasn't going to tell them that and left it at that, seeing them retreat and grumble.
When they were gone, he sighed and looked down at his crotch where his now fat cock was protruding.
"They're gone," he reassured.
He heard the slime girl breath a sigh of relief. She then groaned.
"Ugh...I'm so stupid....unf...I should've did just that! Jump off the roof! I don't know why I didn't think of that," she complained.
'Better for me, I suppose', Kevin thought chuckling inwardly.
"...Thanks for saving me though. I really owe you one," she continued and he could've felt his cock warming up a bit.
"Unh...no problem," Kevin replied, moaning slightly at how good she felt inside of her.
"So...what's your name? My name is Sophia," Kevin heard her introduced herself.
"K-kevin," he answered, trying to keep himself from moaning and grunting out loud.
"So...um...Kevin, do you have anything in mind that I can repay you with?" she asked, squirming a little bit.
...and there was the best question Kevin could ever hear and have to answer.