you're a worker drone were with N in his lab and N left so you have left alone but V had left a chemical on the shore where you were and you got up to see what N had in his lab and when you passed by where that chemical was, it fell on you

Your body begin to change, growing dog ears and a tail apart from the fact that you act like one since it was a potion and you stayed on the floor sitting moving your tail from side to side when N comes in and sees you

N: what happened to you ?! he asked but you only responded with a bark

So now N has to take care of you while he comes up with a potion to reverse the effect for you