UPDATED. COMPLETED FANFIC Things get a little weird after the pack has to get used to having two alphas. scotts eyes still blaze red but now dereks have regained their crimson tint. Not only that but scott has been the centre of attention and jokes as he's been scent marking Kira to warn off other packs. His scent...
So Derek has a small crush on Stiles and some of the pack members figured it out so they decided to play a game to see who can make Derek jealous by flirting with Stiles without really flirting and Stiles is just a clueless puppy.
Derek becomes feral and is super protective over Stiles. He won't let anyone come near either of them, Scott's learned his lesson once. Stiles doesn't know how to feel about any of this, especially when Derek starts scent marking him. Thank you to @WolfMorgan for the amazing cover!!