Synopsis: Juvenile Orion

Mana, after a prolonged absence of seven years, returns to her hometown at the age of sixteen to reconnect with her childhood companion, Kaname. Surprisingly, during their time apart, Kaname has undergone significant transformations. Upon her arrival, Mana's presence triggers a series of life-changing events that affect not only Kaname, but also his closest friend, Naoya. Even her peers, Isshin, Tsukasa, and their instructor Tomonori find themselves captivated by her return. As they gradually uncover the secretive conflict known as the Aquarian Age, which has been fought for thousands of years, they realize that the fate of the world hangs in the balance as Mana steps into her destiny.