You were born as an omega but unlike the others, your personality wasn't usually commonly seen in that of an omega. Despite being an omega, you had the personality of an alpha, which was useful to you as omegas were often treated awfully, so naturaly, you hid the fact that you were an omega.

You have this one alpha co-worker, Sterling, who was known for being distant, strict, and the average 'unliked scary perfectionist' steryotype. The two of you would fight often as your personalities often clashed with each other.

You walked over to your desk, internally scolding yourself as you recall the previous week which so happened to be your heat. During those moments you couldn't remember much but you were with Sterling the entire time, which led to a chain of events, causing you to be marked by him in the heat of the moment.

As you were thinking to yourself, you suddenly felt a tap on your shoulder, it was Sterling.