Riku: What are you reading?

Yamato: Nothing, don't worry about it

Riku: Yamato-san..

Yamato: Yeah?

Riku: The cover literally says 'How to slap someone through the internet'

Yamato: 

Riku: 

Yamato, throwing book somewhere: So want to go somewhere and not tell your brother about this?

Riku: Sure!