Ana-sempai failed her placement test in Japanese language comprehension and is given remedial classes. Perhaps JPLT 2 is not all it's made out to be.
On the other hand, back in the day when I enrolled her into elementary school in America, she failed her English placement test as well, and was sent to a school for little Mexicans[1]. She spoke Spanglish even less than English and the school was pretty much a holding pen for miniature delinquents, so I pulled levers and greased wheels behind the scenes to get her transfered to a normal school ASAP, where she did quite well. Her exams must be affected by Lynette Bishop effect.
[1] The ESL school was intended for children of all emigrants in theory, but in practice parents who cared for their children's well-being did everything to avoid it, with the sadly predictable result.