Hiro goes fishing with Kotaro and others. As they head back to the dorm on a ship, they hear spooky chanting. At the same time, the dorm is suddenly shrouded in fog and students begin to act strange.
Hiro's study files!
!ملفّات دراسة هيرو
Hiros Lernaufzeichnungen!
¡Los archivos de Hiro!
¡Los archivos de Hiro!
sui 
Digimon
Познавательные уроки от Хиро!