Hiro and his friends come to a lake where it is rumored that kappa haunt and drag humans underwater. Against Hiro's advice, Ruli goes near the lake at night, hears mysterious voices, and...
Hiro's study files!
!ملفّات دراسة هيرو
¡Los archivos de Hiro!
¡Los archivos de Hiro!
sui 
Digimon
Arquivos de Investigação 
de Digimons do Hiro!
Познавательные уроки от Хиро!