Sarge, F.I.S.T.S. #1 :

Sometimes it’s just about being in the right place at the right time… with the right person. Sarge is the short story of a burgeoning D/s relationship between two Space Marines stationed on an alien planet where an endless war drags on. Sergeant Wilkes is a hard man with a long, celebrated military career. Brawny, tattooed, and utterly submissive, Murphy is just an interesting diversion… until Sarge realizes he has found something truly rare.