Nishikata receives his first cell phone and can't wait to play tricks on Takagi-san.
He sends her a scary video to frighten her, but it doesn稚 quite work. 
As usual, Takagi-san has the upper hand when it comes to teasing...
Why?
لماذا؟
Wieso?
¿Por qué?
¿Por qué?
Pourquoi ?
Perché?
Por quê?
С чего так?