Definition 1 of 1
Shortform - BHKBB
This phrase is used for mostly high school girls who have not yet come into their own but show great potential in blossoming out of their current behenji mentality at a later stage.
On the other hand it can also be used for just cute school girls who are yet to understand the power of their sexuality.
I know, i know, it is borderline child molester territory but thatandoldonask.