So Natsu has moved into his apartment.

Lucy sees him nearly every day while she's walking in or out of the building, but they don't talk much – just a casual greeting here or there.

That's when she leaves her keys inside.

And like there's no one at the front desk.

There's never just no one there… except for on the day Lucy leaves her keys inside? Why is life so unfair?

So Lucy's just standing by the front desk – she's been standing there for nearly twenty minutes now – and she can feel her ice-cream melting and no. She will not stand there helplessly as her daily intake of creamy deliciousness melts before her very eyes. (Well, not that she can see the ice-cream, considering it's in cartons in her bags, but whatever.)

Desperately, she takes the elevator back to her floor and runs to Natsu's room to knock on his door. For a minute, she waits there anxiously. And then his door swings open.

Some sort of pop/rock music is playing and clothes are everywhere and apparently he has a cat? It's blue… does he dye his cat's fur like he dyes his hair pink?

"Thank you so much," she blurts when he opens the door. "I don't know; I'm locked out of my room, you see? I sort of left my keys inside; they're right on the coffee table, and I should've taken them with me, like, I told myself, "Remember to get your keys, Lucy," except I didn't, but I didn't think that was a problem 'cause I can just go back to the front desk and get a temporary replacement, right? But like today was the one day – the one day – that no one was there, and I just had to lose my keys on the first day in two years that the station is empty – the universe must have something against me or something, I'm not sure – and so I can't get in, but I am in actual desperate need of a freezer because I have ice-cream with me, good ice-cream, and who the fuck wants to waste ice-cream and it's like melting right now and can I borrow your freezer for a moment, please, it's for the sake of the ice-cream and have some mercy!"

Natsu kind of just stands there, confused. And then his face splits into a smile. "Yeah, sure, Luigi! You sure are weird!"

What. Lucy is torn between beaming at his acceptance and giving him a total "wtf" look. Her face twists weirdly in indecisiveness. "My name is Lucy, not Luigi."

Natsu continues, though. And it gets even worse. "I don't see how you like ice-cream though, it tastes funny and it's cold, which is gross. But you can use my freezer for it, I guess."

Lucy's world comes to a screeching halt. Excuse me?! How could anyone in this world not like ice cream like what the actual fuck?

"What." She stops there, frozen with her grocery bags dangling. "I almost don't want to go into your apartment anymore."

A beat of silence passes. Natsu tilts his head in confusion. "You're weird, Luigi," he repeats. "Ice-cream is gross and cold."

He takes her bags, anyways. (Again. How chivalrous, the ice-cream hater.)

Still slightly shocked, she follows him inside his horribly messy apartment and watches him begin putting her stuff in his fridge.

At some point, she nearly apologizes to him for being a bother, but no words form. Also, she doesn't want to say sorry to an ice-cream hater. Ice-cream is practically her religion.

He turns to grin at her when he's done sorting things out. "So, are you staying, Luigi?"

She opens and closes her mouth a few times. "Lucy," she says finally. "My name is not Luigi. It's Lucy."

"Uh… it is?"

"Nope." Does he feel bad?

Actually, Natsu doesn't even look a little ashamed. "Sorry, Luce," he says, with a bright smile. "Are you staying?"

His smile can save lives. It can move Mount Everest. The seas part before it because it is Moses.

Suddenly, Lucy doesn't care that he doesn't like ice-cream. (Well, she cares less.) "Yeah, I guess so."

"Cool," beams Natsu. "Wanna watch How to Train Your Dragon with me? I have the first one and the sequel."

That'll take like four hours of Lucy's day. She doesn't have the time for this. "I just bought Tangled. Throw that in, and you have a deal." What is this she did not mean to say that at all no she totally takes that back but actually not really because she sort of just wants to watch Disney/Dreamworks movies and forget the world for a day, is that too much to ask?

Natsu high-fives her with a grin. "Tangled? It's kinda girly, but sure."

Lucy rolls her eyes. He's just insulting everything she loves, isn't he? "Tangled isn't "girly." It's the best thing. I brought popcorn in my bag, but we have to microwave it first."

They huddle under blankets and watch all three movies without breaks, not even to pop more popcorn.

Once Tangled has finished, they stare at the screen with annoyingly dry eyes. Natsu's blue cat meows somewhere across the landscape of laundry and pizza boxes.

"That was awesome," Natsu says, sounding very much in-awe.

Lucy gets up and stretches. "I know you enjoyed it," she tells him, in a slightly hoarse voice. (Her throat is just remembering how to speak.) "You talked throughout every movie."

"Oh," says Natsu, not even moving his eyes from the screen. "I almost forgot. If you ever need to come in here, I have a spare key to my room taped behind the sign on my door that says "Natsu and Happy.""

Lucy falls over in shock. "You can't just give a stranger access to your apartment," she hisses. Happy crawls out from under a discarded shirt and rubs against her leg, begging for her to pet him. She ignores him. "What if I try to rob you? You… you idiot!"

Natsu shrugs, turning to her with a smile. "You're not a stranger! We spent the whole day together! And Happy, likes you, so you must be a good person."

The cat meows again, almost in agreement. Lucy looks at it. "You named your cat Happy," she says in bemusement.

"Well, yeah. Happy thinks you're weird, too."

Lucy doesn't know what to say. Maybe she should call him out for believing he knows what his cat is thinking? She doesn't think that argument will go far, though.

So, instead, she sighs in resignation. "You treat relationships so casually. You're not supposed to trust and befriend people so fast, you absolute and total idiot. I am ashamed and jealous of you. Big Hero 6 and Brave?"

Natsu totally gets it, which she loves him for. Except not really, 'cause he's a stranger and is also excessively strange, but y'know. "I think I do just fine. And let's also watch Rise of the Guardians," he adds, enthusiastically.

"Okay, so when? Next Saturday?"

Natsu grins back at her. "Next Saturday," he confirms, "Wanna stay tonight?"

Again, Lucy nearly chokes in shock. "No," she means to say. Except not.

She falls asleep on his couch, even though he insisted she sleep on the bed and that he could totally sleep on the couch.

In the morning, she wakes up next to him in his bed. And also half on top of him, but NO ONE SAY ANYTHING ABOUT THAT, OKAY?

She screams so loudly that she wakes up the whole apartment complex.

Somehow, Natsu sleeps through it.