Tetsuo has offered to work with the girls to figure out how Hikari and Yuki, who don't handle heat or sunlight well, can spend summer in comfort. But the school's head teacher suggests that the demi girls' total reliance on Tetsuo might actually be hurting them in the long run. This weighs on Tetsuo's mind...
so their efforts are rewarded, 
and show their gratitude.
.لذلك تُكافَؤ مجهوداته ويظهر امتنانه
sollte sich die Mühe auch
irgendwie auszahlen.
es apoyarlo para recompensar su esfuerzo
es apoyarlo para recompensar su esfuerzo
c’est le soutenir pour qu’il réussisse
ou le remercier,
è sostenerla in modo che i suoi sforzi
vengano ricompensati e mostrarle gratitudine.
Assim os seus esforços dão
 frutos e eles, gratidão.
и благодарить, чтобы их старания
были вознаграждены.