An angel who is considered an apprentice, and is a half-human, half-angel was given an ultimate task by the Angel Superior to guide an evil, mischievous boy.. in short, a bad boy and become his guardian angel, prevent him from doing bad things and change his life completely. Within 100 days, she has to do it or else she would not become a full pledged angel. Worse, they have to live together and she has to live as a normal human being. Here's the thing: It's been a while since she became a human and she also has emotions that humans have. Will her mission be a success? What if the guy is too hard to handle? Will she also continue believing that the impossible can be possible? And one more thing, what if two more people enter the chapter?

Being a guardian angel, with human feelings is not as easy as it looks like. And there's a tendency to fall in love. Will love find its way?