एपि. 19: कazuमी अदृश्य कक्षा की साथी सायो ऐसaka की जांच करती हैं, जो 1940 की दशक की एक भूत है, यह प्रकट होती है।

19

Kazumi starts investigating about a classmate named Sayo Aisaka, whom everybody seems to not notice she is present, not even Kazumi herself. It turns out Sayo was a student of Mahora Academy during the 1940s — and is now a ghost. (Source: Wikipedia)