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 need you to apply that energy in class.
Nutz deine Energie für den Unterricht!
Emplea esa energía en la clase.
Emplea esa energía en la clase.
Garde ton énergie pour le cours.
Impara a usare questa tua energia a lezione.
Use essa animação na aula.
Занималась бы лучше с таким усердием.