Some simple facts to know about Miharu. She is sixteen years old, she was born with naturally pure blue hair and eyes, she is possibly half human and half angel, and she is a Sagittarius. Just some simple facts.

Her entire life is flipped upside down when a group of teenage mercenaries from the nation called Sadona come to her door and claim that she is the so-called Legendary Half- Tennyo. They also claim that they want to protect her from dangers. But do they speak the truth? Mercenaries, government leaders, vicious criminals, and so much more want Miharu for themselves. But thanks to her trust issues, due to a troublesome past, how can she tell who is here to befriend her and who really plans to exploit her for her extraordinary potential abilities?