Seirei Tsukai to Shinjuu Tsukai no Shounen

Seirei Tsukai to Shinjuu Tsukai no Shounen summary:

The world where an existence called spirit supports the life of living beings around the world.
A boy lives there. Hiiragi Akito, a 2nd year student in Element Academy, a school which train spirit users. However, He is a spirit user who can’t make a contract with spirits. Like his father, He hopes that he can join the order of spirit knight, as he is frustrated with his situation that can be said as a lower rank student in the school. However, is there a reason why he can’t make a contract with spirits?
This is a high tension battle fantasy of the boy who contracted an existence called divine beast and the girls who use spirit!