Otogi no Kuni would be the japanese name for Never-Never Land. Otogi being the first part of the word Otogibanashi which means fairy-tale.
Rena's tale takes place in Otogi no Machi. If we disregard the kanji and focus on their pronunciation, the title of Otogi no Machi no Rena can mean Rena from Never-Never Town.
I just thought it was kind of interesting so I figured I'd share it.
- Noncomplatypus the Unenlightened.