It's difficult for me to rate, as in the first half of the story I couldn't relate to the MCs, that got better in the second half. Additionally the whole story centered around the BDSM stuff - who did what to whom and with what, all the mechanics. I missed learning more of Justin and Tobias - was it mentioned what profession they have? Don't remember. And why the constant need of other people in their relationship? No clue. For me even the end wasn't surprising.