Whoa, that's quite the emotionally intense story. I do feel sorry for Lavender and the situation she's gotten herself into; she's definitely boxed herself in and is acting more as a cardboard characture of herself than as herself.
The title is Swedish and translates as cardboard, esp. a cardboard box. Interestingly enough, it's also the name of a well-known costal village in Gambia which appears to have excellent beaches and quite an internationally-known music festival.
Yes, you got it. Who/what would you like your fic to be about?