Agata is normally protective of his younger sister, but his genius IQ goes out the window when he becomes convinced that Saaya and Tsubaki are in love with each other!
But even so, you're twins. That's 
an unusual relationship, huh?
Pero comoquiera son gemelos. ¿No 
sientes que es una relación extraña?
Mas mesmo assim vocês são gêmeos. 
É uma relação rara, hein?