Tsubasa is ordered to score high on exams, so when the lovely Rena offers to tutor him, he accepts. He soon realizes that Rena expects a reward for her help. Minami spots them together and is thrilled at first, but then starts to feel very uncomfortable.
I can clearly see the reason 
you have let your guard down.
توضّح لي الآن سبب تراخيك
Mir ist nun der Grund für deine
Nachlässigkeit bewusst geworden.
Ya veo claramente
por qué bajaste la guardia.
Ya veo claramente
por qué has bajado la guardia.
J’ai compris
la raison de ton changement.
Credo di aver capito perfettamente la causa 
del tuo comportamento inadeguato di ieri.
Eu entendi muito bem o motivo
por você estar tão desleixado.
Я наконец-то поняла,
отчего ты стал такой бестолковый.