Plot idea provided by FTAnt!
Juvia and Lucy frowned as they watched Gray and Natsu get into another fight. "We really need to break them of this fighting habit." Lucy said, her eyes narrowing as she looked at the two boys. "Agreed." Juvia replied, her eyes just as narrow. Erza walked in just then and slammed their heads together as she said "Stop all this violence now!" "Way to use violence to end violence." Lucy muttered, earning a glare from the red head as she asked "What did you say!?"
The color drained from Lucy's face as she replied "Nothing ma'am!" Natsu laughed at Lucy's reaction, starting a squabble between those two that Erza let continue without batting an eye as Gray settled in next to Juvia. All cohesive thoughts fled from Juvia's brain as her love came so close to her. She spewed the first thing that came to her mind was "Gray, my love, if you would quit stripping in front of my love rivals, even for just a day, I would join you in your next scuffle with Natsu!"
Gray arched an eyebrow at the water mage, but replied "Okay, that should be easy." Mira passed by just then and said "Gray your clothes." Gray looked down to find himself just in his boxers as he said "What the heck!?" Juvia sighed and said "Looks like you'll have to start tomorrow." Then she perked up, grabbing onto his arm as she said "Which means I'll have to spend the whole day with you to make sure you don't!" Gray sighed, knowing there was no backing out now.
XXX
The next morning, before the sun even rose up, Juvia stood outside Gray's door, though he didn't make an appearance until nearly lunch time. "Gray darling! I've been waiting for you! What shall we do today?" Gray sighed, he had actually forgotten about Juvia's promise and idea before now. "Umm, I hadn't really thought about it." He answered as he rubbed the back of his head. "Perfect, I have so many ideas, we'll have such fun together!" Gray held back a groan as she pulled him through town.
To his surprise he did have a lot of fun with Juvia, the place she picked to eat had amazing food and the activities she chose to do with him were ones he ended up actually enjoying. The sun was starting to set and they found themselves in front of the guild hall, about to enter, when Gray turned to Juvia and said "Today was fun." Juvia felt like her heart had stopped, her darling Gray had enjoyed her company! She was about to say something when the door swung open, slamming into Gray.
Of course, the perpetrator had to be Natsu and said "Sorry Popsicle Breath, I didn't see you there." The smirk though told he was itching for a fight and wouldn't mind if it riled up Gray. Gray's eyes narrowed as he said "You should watch were you're going Ash For Brain!" "Oh yeah, you want to go Ice Princess?" Natsu asked, lighting his hands on fire. "Bring it!" Gray said, shedding his shirt.
Juvia stepped back to avoid the carnage. She sighed, Gray had almost made it a whole day without stripping. Suddenly his pants hit her in the face. A creepy smile crossed her face as she thought "Then again his stripping does have its perks." She picked up the shirt that he had shed earlier and snuck off with them, deciding they would make a fine addition to her Gray Collection.
FTAnt's Idea: How about a funny one, like Juvia promises Gray to join in and help him in his next scuffle with Natsu if he promises a nice day out with no stripping. He can make it most of the day and at the very end runs into Natsu and ends up stripping then brawling.
Hope you liked it XD