Ok, Haruko asked Kamon to use his head and he "gladly agreed"... and in case you don't remember, using a head for N.O. includes bashing on said head with a v.tough guitar. So Kamon dies, and Haruko hides the body in the closet and creates a replica to avoid being revealed. Of course, she wants robo-Kamon to suit her needs better than the real one would - she "flirts" with him, even uses him to make her a massage, which she'd *never* allow to a real one (even though he'd be extremely glad to
). He's no perfect, though, so she repairs him at night... and Naota hears her mumbling, discerns few ambiguously sounding phrases and thinks that some hot hentai stuff happens between them. He's boiling inside and the next day when he sees "dad" he finally explodes. I don't think the cat/mouse scene is what *really* happens - it's what his enraged imagination pictures to him. So he swings the bat - and whether he hits the robot or merely a TV, but the robot is broken. Amarao uses the situation to threaten the kid about supposed patricide when interrogating him. In the end, he tells the truth about the robot, so Naota comes home, discovers the body in the closet and revives him. Don't ask. Anime wonders, 'nuff said.