Serena finds something precious in her belongings, and takes it to the person she loves most / Serena x Darien fluff

As the United states is befallen to the Chimeran invasion fleet, Baltimore is overrun, and as the Chimera head west to control the country, only an elite group of soldiers stand int heir way. The mission is pure suicide, but these patriots will die fighting. Their group is known as S.E.B.A. or Superior Enforcement Battalion of America.