And They Were Roommates

When Magnus opened his home to Jace, he hadn't realized the Shadowhunter was an omega. An unmated omega, at that. Now, he had to adjust to having the omega in his space, just as Jace has to adjust to living with an unmated alpha. Slowly, they grow closer, learning more about each other. They find comfort in each other and as slowly do they fall in love. Magnus/Jace slash Jagnus