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!
You're a too-serious, inflexible guy 
who needs to get with the program.
A pesar de que eres una persona 
demasiado seria, terca y rígida.
Você é um cara sério demais, 
que não sabe ceder e nem se toca.