Hmmm, interesting. So the gist is as followed. Mike came back to Rove with a cursed wound that cannot be cured by simple remedy. Rove had to cast maximum power of healing magic to neutralize the curse lingering on his body, but still, Mike had to suffer in the process. After that, Rove complained that Mike always being careless about Mike's own life regardless of his feeling, basically a confess. And they fucked. It was just, since Rove was mad then, he asked Mike to be the bottom. Also, when torturing what Rove asked is to have Mike take him on the next journey.