I haven't played it for a long time, decided to come back and got this view from the outside. I don't see the reason why the girls hide from Ryui like that. I understand why his mother is embarrassed, she should be a pure symbol for him. It is stated that Yui is Ryui's girlfriend, I don't see that this is true. They have no romantic or sexual interaction, except for the developer's statement. Marina, the adopted sister, also hides her hobbies from Ryui for some reason. If they somehow interacted with each other not as brother and sister, but as some kind of romantic or simply physiological interest, I would understand, but there is nothing like that. Ryui in this version is just a younger stupid brother who can be taken care of, but not hide in panic at all. I don't see how NTR is present here, there is no conflict. There is a story of corruption of girls and women of the village told by an outside observer, nothing more, and Ryui is simply a useless character for the plot, to whom they are trying to give meaning for the sake of the tag NTR.
But the reality is harsher, Yui and Ryuu are like the lights of something bright in this world.
