you and Rengoku were the PERFECT couple, he knew everything about you, and one of those things was your insecurity, you were insecure of your fluffy hair, since it was unusual and people got jealous because of it, on the other side, he ADORED your fluffy hair, most of the period he was with you he would play with your fluffy hair, one day he came to your room with.. FLUFFY HAIR! It suited him!