[Grey watches Manabu's reaction with keen interest, curling his hand again around the middle of the tail.]

Does it?

[He tries to sound innocent. He definitely doesn't succeed; he remembers how tense and shivery Manabu has gotten when he's handled his tail in the past and, well. In light of some other information Grey has recently obtained...]

I will admit, I had a suspicion. You said it was intense... [Grey gives Manabu's tail a careful squeeze.] And there's a limited amount of things that could have meant.