I figured out a way for Akane to find out about Ryouga's curse without him
getting killed.
It would go something like this:
<snip>
Um ... why would this fascinating trivia mitigate the psychotic
rage that Akane would feel about Ryouga taking advantage of her kindness
to sleep with her?
The story would be that the P-Chan she had been sleeping with was Ryouga's
pet. Now, Ryouga comes back from a trip and shows that while he was gone,
he got cursed. So according to the story, he had only been cursed the past
few weeks while he was gone.
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"A gun? Don't be ridiculous. You wouldn't shoot me.
You don't have the--" *BANG* "--guts."