As the guardian angel of an assigned human, you had to protect your human at all costs, but..you fell in love with him instead, and he did too...     But when the higher-ups found out about your romance, they wiped out Scaramouche's memories of you, which left you completely crushed because you were forced to still protect him..

  "Uhm, you're my guardian angel?" Scaramouche said as he looked at you with a raised eyebrow.