Basara's childhood friend Nonaka Yuuki warns him not to get involved with Naruse Mio any longer. She is a fellow member of the hero clan, and the one charged with observing Mio. She claims that Mio will bring great disaster, but Basara proclaims that he will protect Mio as a girl on his own.
I'll definitely pay you 
back for this someday.
Dafür werde ich mich definitiv
mal bei dir revanchieren.
Te devolveré el favor un día de estos.
Te devolveré el favor un día de estos.
Je te revaudrai ça.
Mi sdebiterò di certo, un giorno.
Vou dar um jeito de te 
recompensar por isso algum dia.
Как-нибудь обязательно отплачу.