[That... tracks, with Akira's bizarrely positive luck. Akechi hums, nodding again, and continues to sip at his coffee, slowly shifting his posture and expression to appear more like how he is usually seen.]

Typically I don't think they are especially expensive, but Sakura seems the type to hold sentimentality in places unexpected. [He inspects his cup idly.] These look like they are quite old, so you may well have broken an important memory in the form of a cup. [Except he also knows Sojiro isn't stupid, and wouldn't put out important cups to be used by customers or the bumbling teenage idiot he was housing. He might just be trying to taunt Akira again, hard to say.]