>What's the correct title? Not sure but I already like what I see for the contents.
The series altogether is "JK Ponyta".
Ch.1 - Osananajimi wa, JK Ponyta |- My childhood friend is JK Ponyta |- My childhood friend is a JK Ponytail |- My childhood friend is a high school girl ponytail |- My childhood friend is a ponytailed high school girl Ch.2 - Aki-nee to... JK Ponyta 2 |- With Aki-Nee... JK Ponyta 2 |- With Aki-Nee... JK Ponytail 2 |- With Aki-Nee... High school girl ponytail 2 |- With Aki-Nee... Ponytailed high school girl 2 Ch.3 - AKISIRI ~JK Ponyta 3~ |- AKI ASS: JK Ponyta 3 |- AKI ASS: JK Ponytail 3
The most sane approach may be "JK Ponyta Ch. 1-3", or just "JK Ponyta" since it seems the series is over. As a rule of thumb for cases like this the gallery name shouldn't have every single chapter name but the series title with the chapter numbers, and the translated pages themselves should have the translated chapter name when it appears. Therefore you might want to add the translated chapter titles to pages 1, 23, and 45. You also should translate "AKISIRI" in page 46. Having separate galleries is always an alternative and the default since that's the way it got published.