I assumed this was a romance and was shocked to discover it ends with a break up. [Edit: Alas, it is mentioned in the blurb that there's no HEA but I didn't notice it.] However, it's not only that; the break-up comes because one of the MCs exploits and betrays the other in a terrible way. I found John's actions an unforgivable breach of trust, and my hope is that Mitchell finds someone else who loves him the way he deserves it.