Shouta is troubled over how to approach Lucoa about her daily, uninhibited contact. He should be the master in their relationship, though... He resolves to take back control as the full-fledged mage he's aiming to become. So he begins trying to uncover Lucoa's weaknesses.
Well, it means they've matured 
out of their immature state?
في الواقع، يعني أنّه نضج وخرج
من حالة عدم النضوج
Eh bien,
lorsqu’il finit sa croissance…
Immagino che quando passano
da un stadio immaturo a uno mat...
Significa que eles alcançaram
a forma adulta, não?
Наверное, когда вырастает
из юнца в полноценного…