This is wonderfully humorous and so entertaining, and I really like your writing style. I think I was begging Sesshoumaru not to put the collar on right alongside Kagome, and I had to laugh at the poor girl's misfortune at the end. Wrong brother indeed!
Liked it overall. Just as an FYI Jaken is Sesshoumaru's retainer, Sess isn't Rin's retainer. Here's the definition; An employee, typically a long-term employee. or A servant or an attendant, especially one in the household of a person of high rank. I'm not sure what you'd call Sess from Rin's POV.