Till the Day I Depart (Rainbow Six Siege x OC)

It is known to nearly all combatants around the world that Team Rainbow is a brutal and effective front line combat force, but all of that changes in an instant when the White Mask terrorist organization allies themselves with what is left of the Sentinel Corporation, the invaders of Auroa and a pair of unlikely and hellish combatants are recruited to Team Rainbow.

Authors note, this is the Revamp of "When Comes the Raine" and will likely feature many of the same story elements.