Orion no Shounen: Aquarian Age Series by Sakurako Gokurakuin

Sixteen year old Mana returns to her hometown to unite with her childhood sweetheart after 7 years. But Kaname seems to have changed during their years apart. Mana's presence sets off a chain of events that changes the lives of Kaname and his best friend Naoya forever. Their classmates Isshin and Tsukasa, and their teacher Tomonori find themselves drawn to her as well. They soon discover that they are all a part of the Aquarian Age - a secret war raging for thousands of years... moreSixteen year old Mana returns to her hometown to unite with her childhood sweetheart after 7 years. But Kaname seems to have changed during their years apart. Mana's presence sets off a chain of events that changes the lives of Kaname and his best friend Naoya forever. Their classmates Isshin and Tsukasa, and their teacher Tomonori find themselves drawn to her as well. They soon discover that they are all a part of the Aquarian Age - a secret war raging for thousands of years. Now the fate of the world hangs in the balance as one girl meets her destiny. less

After coming to terms with the dark side of both their pasts, Mana and Tsukasa decide to move forward. The power of the Aquarian Age is a double-edged sword. They realize that their powers may harm others, but can also be used to protect those they love. Meanwhile, Kaoru and her group continue their twisted game of hunting those with power, and Mana is their next target. Kaname, Naoya, Isshin, Tsukasa, and Tomonori rush to save her, but Kaoru's men stand before them... moreAfter coming to terms with the dark side of both their pasts, Mana and Tsukasa decide to move forward. The power of the Aquarian Age is a double-edged sword. They realize that their powers may harm others, but can also be used to protect those they love. Meanwhile, Kaoru and her group continue their twisted game of hunting those with power, and Mana is their next target. Kaname, Naoya, Isshin, Tsukasa, and Tomonori rush to save her, but Kaoru's men stand before them. The final battle between hatred and love is about to begin. less

The final battle reaches its climax as Mana and Kaoru push their powers to the limit. When Israfel attacks Tsukasa and Tomonori, something dark within Tsukasa is awakened. Meanwhile, Kaname faces off against Ama-Inu, with devastating results. Mana's strength as a Mind Breaker is put to the ultimate test. Can she save those she loves before it's too late?