The relationship between the twin's father and mother
Is Mine kinda lying to Nagisa as other villagers too? Cuz we know:
>!Villagers will share the secrets of the village and choose whether to stay when they become adults.!<
>!The first time Nagisa found out that she could return to the modern world is when Tadera dropped his contact lens (Chapter 51)!<.
If I have to defend him, >!it will be that the villagers including him do not really know about the modern society so he cannot understand Nagisa's situation at the beginning.!<
But I do think there should be a moment for Mine to confront to the truth that he is a former villager too.