After reading the comments, I have come to the conclusion that Vio requires urgent help from a psychiatrist/psychologist. I still believe that her sister shouldn't have sacrificed intelligence points for charisma during character selection.
The relationship of Yuki and Lefi would not feel out of place in Seinen and probably even Josei demographics. By that I mean they are pretty mature and natural on how they interact with each other unlike some romances that feel forced in their stories (e.g. characters that are attracted to those...
How about a boring theory? Maybe the philosopher's stone is a metaphor for "ancient" technology digitally preserved during the deterioration of the human race? Maybe it's related to terraforming?
Next thing you know, there is an excellent, or should I say, spiffing Brit in the Nogah family selling mainly Yorkshire Tea while manipulating space and time, and even reality to his favor for maximum profit, all the while praising the Queen.
It can be excused that he (now she) is still getting used to his new body which probably had weaker hearing than his previous. BUT, how can he forget to activate his own ability (gift?) that he literally had his whole (previous and current) life? He's trying to hide from them yet using one of...