Typos and stuff:
Text after Petta battle: because of you father > because of you, father
Class text for Petta: "Overlord's Daughter" goes out of bounds, change to "Zetta's Daughter"?
Suggestions and oddities:
More text after Petta battle:
http://www.ugstunt.com/wtext6.png
Shorter rewrite which should fit, in case it's needed: "Surely, you didn't travel to this era just so you could meet your father's younger self, right?"
The above text box spaz-out also seems to affect the story a bit further in:
http://www.ugstunt.com/wtext7.png
And here, too:
http://www.ugstunt.com/wtext8.png
And here:
http://www.ugstunt.com/wtext9.png
You get the idea, this happens like ten times (not even joking) during the after-battle conversation. I'm hoping that shortening the original text bit fixes it, but I have no idea how this stuff is handled internally.
(edit: see below, outside of spoiler)
There's also a bit of odd text spread out across two text boxes, which goes like this:
"If the Netherworld disappears and something bad happens to father,"
"of course, my existance would also be at risk."
Rewrite idea (with a small spelling fix, too) to make it a bit less jarring:
"If the Netherworld disappears and something bad happens to father..."
"...of course, my existence would also be at risk."
Another two-box oddity:
"(... Hm. I see, if Petta really is my daughter, then the state of the"
"Netherworld and my safety are tied to her own existance.)"
Rewrite idea with the same spelling fix as above:
"(Hm, I see. If Petta really is my daughter...)"
"(...I suppose the state of the Netherworld and my safety are tied to her own existence.)"