Hayakawa Rou is a student at the school where Morinome Shinako teaches. They seem to have some kind of shared history.
Dude, you're dense.
.أنت أرعن
Du bist echt schwer von Begriff.
Eres muy corto.
Eres muy cortito.
Tu le fais exprès ou quoi ?
Certo che sei proprio tonto.
Você é devagar.
Долго до тебя доходит.