The cultural anthropology club at a school in the remote Japanese countryside is doing a report on the AoOni, a mythical creature that inspired a hit video game.  They find that the AoOni was based on a creature who may live in their own area.  But things take a horrible turn when they learn that the creature might still be real, and that the creator of the AoOni game has just committed suicide before they were to meet with him...
But that means the killer must be someone 
who knew you were going to meet the writer.
Der Mörder wusste also,
dass wir den Entwickler treffen wollten.
En tal caso, el asesino sabía
que la presidenta iría a verlo.
En tal caso, el asesino sabía
que la presidenta iría a verlo.
Le coupable savait que la présidente
voulait rencontrer le créateur.
E significherebbe che il colpevole sapeva
che noi dovevamo incontrare quella persona.
O assassino sabia que nos 
encontraríamos com o autor.