this reminds me of Finis and Ferb...they had a song about a ninja of love
lyrics of the song
I should have known from how I felt when we were together. And even more when we were apart! You tiptoed in, and you got under my skin! You snuck your way right into my heart! I put up barriers, to shield my emotions. A wall that you could never break apart! Like a ninja of love, repelling down from above! You snuck your way right into my heart! Oh Yeah!