The Elementix High School Harem.

In an outer world, far away from the earth existed an empire called Elementix. Their sovereign was king Sun and queen Moon. Their children were girls who were blessed with elements from nature. One day Dario the most powerful destructor of the universe and rival, to the king, struck in the highly protected empire and at the same time, the heir to the power of king Sun and queen Moon was still a baby. The queen reincarnated all the princesses and sent them to earth. They will later meet in a high school and their youngest sister will train on earth to destroy Darium and save the empire.