It's only love 20 (Luffy x reader)

 
 By some odd stroke of luck, Luffy found a hatch atop the whale when (Y/n) had thought for sure they would be goners with the whale quickly preparing to submerge. After Luffy's ingenious plan of beating the whale until it spit out their crew mates, the Whale decided it had had enough and was going to go below the icy waters. 

 (Y/n) didn't have time to contemplate the reason for a whale having a hatch on its body, for her hyperactive Captain grasped her small wrist firmly in one of his strong hands before dragging her rather roughly into its murky depths, she couldn't even open her soft lips in protest to the idea. 

 Brown eyes widened in shock, her captain's pale lips falling open in disbelief at the strange discovery laid out before the duo's eyes. 

 There was a passage way, lined with metal and wood. Screws and other oddities seemed to hold the makeshift tunnel together, all of which vaguely reminding her of a low budget submarine, or one that was crafted rather crudely. (Y/n) didn't have to glance at her Captain to guess what he was thinking.

 "Eh?" Luffy breathed, tipping his head slightly to the side in confusion.

 "How come there is a hatch and passage way inside of a whale?" Luffy voiced his question, looking uncertainly at the girl standing beside him. She returned the look with a confused one of her own, cocking her head to the side and trying to determine whether or not they had actually drowned or were just imagining the whole thing.

 Perhaps they had swallowed a bit too much sea water...

 Before (Y/n) had the chance to open her mouth to speak, the whale began jerking and moving wildly. The movement sent the two falling down the now vertical passage at a rapid rate, the force knocked the wind from her lungs and she found herself unable to do much other than gasp in surprise.

 Landing in a tangled mess of limbs, she found herself once again on top of her Captain. Although she wouldn't be the one complaining, his rubbery body did well at absorbing the landing, at least for her. She couldn't say the same for Luffy though, given that he had been the one to break her fall for the second time.

 "Ouch, that hurt!" Luffy complained from his place beneath her, he went to sit up and possibly ask her if she was alright, but was cut off when another forceful quake sent them flying. Luffy yelled something along the lines of "Again?"
 
 His tone was a mixture of confusion and frustration, and she couldn't really blame him for that. They had barely even made it to the red line and crazy things were already happening. Not to mention the fact that all the constant Jostling was starting to make her feel sick, and she was quite dizzy too.

 Every where Luffy went he was always surrounded by absolute, undeniable insanity.