I’m sure there’s a mamasan version of the story that’s more damning to Nanami, but I appreciate OP’s well-written apologia, and believe him that she can be a sweetheart… probably can be a bitch too, when she wants.
As for Nanami, I've seen her twice. Definitely a very good time. Pretty sure she's bitch first though; and is sweetheart second, for pay. I love bratty, spunky, and/or temperamental girls. Makes the sex that much hotter.