Touya and Minori and the rest of the players in the training camp are hitting a wall with the way they fight.  And Minori's suggestion is that they introduce themselves to one another!
I wonder why.
Warum wohl?
¿Por qué será?
Je me demande pourquoi…
Chissà perché...
Não sei por quê.
Даже не знаю почему.