[Even as he tries to watch him more closely, telling himself it's because of wariness, much like Shiro worries, that he could still do something else... (Something else? Like what?) The thought doesn't ring true either. So while his words are met with silence, Keith not making a move either way for too long -- enough, maybe, that more of it just slips away from him. There's no way to explain it. He's looking down through his frown, admitting.]
... I can't remember it. What happened. [Him?] You.