This is part of the A/B/O universe. Omegas are far and few between and any beta or alpha who wants one for their mate has to go through a series of trials to weed out the competition. Thus Derek sets out to court Stiles. This was a bit rough around the edges and not as smexy as past fics in this trope but I liked the world building and concept. This was short with sweet fluffy goodness plus KNOTTING.