To the Edge of the Sky by Aja

Please also note this game’s art is different from the original demo you may have heard about. Please review the screenshots.
There is also a Premium version with more features available here.
Enter the year 2077 and become Seven, the newest addition to Phantom Alpha, a secret team who operates under the enigmatic government organization known as P.H.A.N.T.A.S.M.
After joining, you find yourself befriending the other rookie on the team, an incredibly skilled youth known to you only as Zero. As you meet the other members, you realize that despite being a team, they all vary drastically in personality, background, talent and ability.
Regardless of your differences, Phantom Alpha diligently completes missions alongside each other. But together, you soon discover that on the other side of the radiant world of light, lies an equally dark world of shadows…