Makoto is surprised by Saki's confession of love and has to clarify that he is not the girl Saki thinks he is. However, Saki is undeterred and throws herself wholeheartedly into the mission of becoming Makoto's first love. 
I got blood on your handkerchief!
¡Manché de sangre tu pañuelo!
¡He manchado de sangre tu pañuelo!
Ah, manchei seu lenço com sangue!
Испачкала кровью платочек!