Allen and Riliana Autriche are the twins of the current Queen and King of the Yellow Kingdom. At the young age of four, Allen was taken away on his father's orders to learn how to become a full-fledged servant. Meanwhile, his twin sister Riliana, became Queen of the Yellow Region. After ten long and painful years, Allen comes back by himself to the Yellow Kingdom to serve Queen Riliana. Upon arriving, Riliana tells Allen that their mother and father died, and that their parents' servants left. There will be many troubles ahead, but what is the truth that Allen is hiding?

Tsuki kishi is a young sixteen year old girl who has lived her life alone since the age of 3. After wandering aimlessly in the forest for years, she has finally began to live amongst the people but all that is soon taken away why?. Why was she abandoned? Why did no one care she was gone? Why does she look different have have strange powers? Who are her parents? Tsuki has many questions about her life will she find the answer to these questions? She tries to figure out the answer to these question whilst at the same is discovering the past and people known as weapons who are different like her but are respected and looked up to, unlike her. She also mets a boy named Kasai who loses his family. How will he affect her main goals?