Yuta witnesses the worst-case scenario as was warned in the video.
My textbooks and notebooks 
were rendered unreadable.
Meine Bücher und Hefter waren
immer sofort wieder unleserlich.
Mis libros y cuadernos quedaron ilegibles.
Mis libros y cuadernos quedaron ilegibles.
Dès que je posais un livre ou un cahier,
quelqu’un le gribouillait
Se perdevo di vista libri e quaderni,
 li ritrovavo inutilizzabili.
Meus livros e cadernos 
ficaram impossíveis de ler.