[ Well that's not a loaded vague reply that does nothing to settle the unformed questions starting to rear up at the odd line of conversation; he hadn't been going to make any excuses for his own blunder, but it appears his host is on to something. Maybe. A frown at Ginko's own question, but he's obviously more interested in learning more than making a break for it now. ]

Hmm, I stopped at a kiosk maybe around 8 or 9 as I was heading home? I was kind of late getting back, so I would have been a little tired anyway.

[ His tone clearly lets on he didn't think he would have been quite that tired. ]

Er, I think I may have left the cup in your fridge, so I can grab that on my way out. [ Not usually one to waste things, Akihiko will probably be dumping that now that he knows. ]