[He never said that! His scowl when Manabu brings it up again says that he's considering throwing down, if Manabu doesn't stop acting like that's what he said.]
I don't think that's a good idea.
[If this were anyone else, that tone of voice might be called petulant.]
no subject
I don't think that's a good idea.
[If this were anyone else, that tone of voice might be called petulant.]