Gai's come up with a new mission, but before Shu can officially join the team, he has to show that he measures up by winning a mock battle against Ayase's Endlave. Time for basic training! But can Shu concentrate on combat after Inori turns him down?

Inori's been kidnapped by forces intent on performing a secret ceremony, and the only way for Shu to get her back is to remember what really happened on December 24th, 2029.

Ten years ago on Christmas Eve, Mana, Shu, and Gai had a fateful encounter in a church. That’s the story we already know. The story we don’t know: where were their parents?