He wasn't an ex-detective for nothing, so, yes; he'd made a few theories before Kiryu had finished. And wasn't too surprised to find Kiryu's answer to involve Alastair. Honestly it would have taken an idiot not to realize the goings-on of their floor. It had been half the reason Saitou had locked them in his room, in the first place. He knew they were already particularly close, and lo, the arguments had settled fairly fast.

... So why did he feel disappointed? "I've told you before I can single out certain sounds and mute them by now." That's all he was going to say on it. Saitou was still pondering why he felt any sort of reaction at all.