There was so much finality to that.

Unrealistic finality.

Alarms blared in his mind, over and over as his thoughts whirled and his mouth threatened to spill the words he so badly wanted to speak:

Kaiba, what is wrong with you?! Are you hearing yourself?!

Something strange is happening under our noses and you're not even mildly alarmed?!

This isn't right! Something's wrong!!

He couldn't.

He didn't dare speak on it; he kept dancing around it! Dismissing it!

Nnnngh.

"Oh, don't mention it! It's no trouble at all; I'm happy to help."

Quickly, he pulled out his phone and sent a text to Mokuba:

Hey, can I talk to you sometime after work tomorrow? Your brother's acting weird and I want to see if it's just me.

"Does not bat an eyelash at a stain on his suit jacket" weird.