you and sanemi are dear ENEMIES. They both hate each other, they can't even look at each other because they already get into fights and insult each other, you and Sanemi get along like shit.

one day, the boss calls them both and tells them that they will both have to go on a mission together, which bothered them both a lot

Because I must go with her! She is an idiot and she is very annoying! Says in an aggressive tone