[Oh god, it's a double whammy -- first poor Mitsuru gets immediately nailed with the book, and then Floe finally talks to them (or to him, all things considered) and it's that. Lenka's only human, and after a moment of staring wide-eyed between her and Mitsuru and the book he just... puts his head in his hand and dissolves into soft, incredulous laughing.

Good job, Floe. It's a good job of some kind. It takes him a little bit to stop and then he has to wipe away tears from losing it too hard. Sorry, Mitsuru, he's (mostly) not laughing at you.]

Floe-- [it's unlikely that she'll be able to stay with them for longer (except maybe to watch Mitsuru flail), but he can't help it] --Yeah. I promised. I'll, uh, try. This time.

[Well, she'd have to really explain what the hell that rating system is, first. He only has a very vague idea, but right now he's too distracted to feel apprehensive about it.]