[He does sit on the coat - there's no reason to get his new pants dirty, after all. (Where did he get these pants, anyway?)]
So what kind of logical conclusion can you get from that?
[A lot of the innocence in his tone has suddenly dropped, and he's staring at Moji critically. He isn't sure what this means - people don't remember? That couldn't happen to him. He remembers everything. What's going on here?]