It Will Always Be You (Lashton)
"Come on, let's have a cuddle." Ashton says and Luke thinks the last thing he needs right now is the source of his problems to be as close as possible to him, but he can't say no, can never say no to Ashton.
They squeeze into Ashton's bunk, Ashton with his back to Luke, Luke's arms protectively curled around the older boy. It's a tight fit, but it just means they're even more pressed up to each other and Luke secretely loves Ashton all cuddled up to him like this.
"Is nice, this." Ashton mumbles and Luke doesn't respond, just buries his nose in Ashton's hair and takes in his scent.
or, the one where you get a short vision of your soulmate on your eighteenth birthday and ashton and luke are idiots.