Though you knew the risk of exiting the mansion with the pack of briefs, knew there may have been a way to change yourself back to normal and knew you could stop the potential and terrible chain of events that would turn others into horny anthro German Shepherd like yourself... you wanted to build your pack anyways.
As it was known, you were not only an anthro German Shepherd, you were also horny: lustful thoughts of other anthro German Shepherds following in line behind you, loyal to you, their alpha, and obedient to your every whim, as you were to your briefs, began filling your mind, fogging and rewriting your brain with that desire. It didn't help that your briefs were filled with cum that squished against your furry balls and erection with every step you took. Maybe if you had resisted the urge to release your human lust into the undergarment, you may have been able to escape.
But alas, your humanity had already been forfeited to the briefs the moment you ejaculated. While you remember who you were, the people you've meet and the places you've been, your human logic, values and morals were now leaking out of your briefs, along with your humanity that was also expelled with your cum.
Now knowing where you were and your objective, you navigate through the mansion with ease and walk out into the night, panting in excitement at the thought of building your pack by making others like yourself, causing your tent in your brief to twitch excitedly as well. You don't even notice the two anthro German Shepherds, whom were talking behind the other door earlier, watching contently you walk out with your package of their briefs under your arm before fading away into the mansion.
After looking through your thoughts, you conclude the best way to begin your pack was to bring in young blood. That being said, your old high school came to mind. You smile with your tongue hanging out as you imagine their innocent minds quickly succumbing to the lust and obedience to the briefs and yourself.
As you walk out of the park, you don't even realize that the path had lead you to the forest behind the high school, as you already have knowledge that the magical path will only allow you and those under you access to the mansion and anywhere else.
Quickly running across the empty multipurpose track field, you silently slip into the school through the lower locker room window. Though all the lockers have combination locks on them, their security was helpless to the small vents each locker has, allowing you to slip the German Shepherd Beast Briefs in each occupied locker. And to make sure none of them fail to give in to them, you reach into your own briefs and rub a glob of your perpetually dripping pre onto the handles and vent holes to all the lockers and doors.
With your first objective complete, you decide you want to make sure your new initiates are properly welcomed. So, you wait in the one of the private showers, knowing the students never have time to take one by the time the locker room is unlocked and class starts.