Rentaro encounters the smartest student in school, Eiai Nano, and it turns out she's a soulmate, too! However, her extreme rationality leads him to question whether they really are meant for each other.
Why?
لماذا؟
Warum …?
¿Por qué?
¿Por qué?
Pourquoi ?
Perché?
Por quê?
Почему?..