The number of characters Rin plays in front of Eiji keeps increasing. When it is revealed that Rin has a younger sister, she plays a little sister character. During the cultural festival, strange characters also begin to emerge.
The... The law of sines!
‫قانون... قانون الجيوب!
S-Sinussatz!
¡La ley de los senos!
¡La ley de los senos!
La… La loi des sinus !
T-Teorema di Eulero!
A... A Lei dos Senos!
Теорема синусов!
ตรี ตรีโกณมิติ