"Stop!"
Surprised, Jace did. The suspiciously empty street looked back at him. Shrugging internally, he ignored the shriek.
"Hey! Nooo...Stop it!"
Just after hearing the second yell, Jace realized he was on Magnus' street, and had stopped coincidentally in front of his apartment building. Jace had passed this off as another one of Magnus' shenanigans at first, but...
When another declarative emanated from the door, Jace's eyes narrowed. Alec was in there. Pausing slightly before cautiously running up the stairs, he flicked out a seraph blade.
He stepped quietly towards the entrance, about to peek his head around the door frame, when-
"Ouch! Magnus, quit that!"
A giggling Alec fell through the doorway,with Magnus close behind him, tickling whatever bit of skin that flashed through his clothes. Alec balanced precariously at the bottom of the stairwell, just having time to adjust his jumpsuit before having to bat away Magnus' kisses once again.
Jace raised his eyebrow at their appearance. For one, he had never once seen Magnus so relaxed, fashion wise. He was only wearing ripped jeans and a white shirt, and for another thing, Alec seemed genuinely exhilarated.
Jace watched with an amused expression as the couple caught their hands together and walked down the street, Alec talking animatedly while Magnus laughed.
Both had missed seeing him for the most part, him having jumped directly into the bushes on the side to avoid being seen, and as Jace closed the door behind them, he was glad.
Perhaps later he wouldn't be cornered yet again by Izzy, demanding details like she had every other time when he'd let slip that he'd glimpsed them at the fair the week before (The events that happened there are another story; would you like to hear them?).
Jace was glad to see Alec behaving this way, though it was sometimes questionable, but Alec deserved the best the world could give. He decided then that he would write a handbook for Magnus. The... Guide to Alec's happiness, or something along those lines.
It'd start with,
Rule no. 1: Keep Alec Fed, or I will feed you to a Behemoth demon.
Rule no. 2: Never Embarrass Alec, or I will steal your glitter and kill your cat.
Rule no. 3: Love Alec Unconditionally, or I will personally beat you up.
Rule no. 4:..