[ Kuramochi stays still as he listens to Momo speak. Or that he can't do much while he's listening to prevent any of his thoughts from easily showing up as his expression.

He's feeling his emotions wavering, optimism showing up at first, only to quickly dip down at the "but" and gives a frown. ]

Why the hell would I be messing with you? I said I was gonna keep it to myself until shit happened didn't I? It ain't something to joke about.

[ Or more like it'd a real bad joke that no one can laugh at. ]