OMG! I luff you! Your so right about there not being any HirumaxSena pairing and I do see a lot of the HirumaxMamori (wtf is up with that I have no idea)You did a really good job on keeping the characters in character so I really commend you for that because i've read lots of fanfiction where they (other pairings) are way out of character and it kinda ruins the story =_=
Anywho, I loved this little one shot and esp the part where Hiruma was possessive. kyaa Hope that you write more of HirumaxSena! (cuz I can't write worth crap xD)