A summary of the Buddy Complex series told from the point of view of Nasu Mayuka.

Hina comes aboard the Cygnus with Aoba and Dio, and she must decide where her allegiances lie. Meanwhile, her former comrades return home to Zogilia to find a shocking turn of events.

Bizon attempts to exact his revenge, seventy years in the making. And Hina and Aoba finally find out where she's from and why they seem to share a special bond.