Angel Lover

At a time when Angelina was at her emotionally lowest, a wonderful man showed up and cured her of her broken heart. And as timely as he appeared, he left shortly after she became ready to love again just to find out he was an angel. To remember the kindness he had shown her, she opened up an agency named "Angel Lover" to help others like herself who was hurt in love.
(Source: DramaWiki)