Having scored higher than anyone else in his grade, including Hiro, Nagi decides to finally confess to her.
It's just that you two 
know each other so well.
.كل ما في الأمر أنكما تعرفان بعضكما جيدا
È solo che voi due vi conoscete così a fondo...
Só acho legal que vocês
dois se conhecem bem.
Завидую тому, что вы
всё знаете друг о друге.