Once Upon a time, a serial killer that targets wesen framed the local Grimm for his own killings. Out of fear his Grimm had lost it, the Prince reached out his live-in girlfriend to see how he'd help them out. Problem is: that's not something a Prince oughta do when attracted to the Grimm's girlfriend himself. Fortunately for Bud, the Grimm wasn't alone in this for a Griffin, as brave as an eagle and with the heart of a lion, saved both wesen and Grimm from the copy cat killer.
Bearing sunglasses as if modern day glass slippers, the Prince offers his apology. He can't help himself around the Grimm's girlfriend, nor she can help but to kiss him back, once she figures out it was his kiss what woke her up.