it seems 4 years ago there's some kind of incident which resulted in many knight and saint died, perhaps when attacking or purifying the dungeon or something, this is the time when ange's sister got killed and tia failed to save her
after the incident, the kingdom decided to gather all of the saint in the capital
this also resulted with tia want to conquer the dungeon alone to avoid more victim
however it shows later that the incident is related to the ploy of tia's half(?)-brother sirius/cryus omething who is part of the kingdom upper echelon, maybe he has some kind of plot to overthrow the kingdom or something, thats why tia branded as heretic and sent to the border
reina, the no 1 priest is totally on tia's side, thats why she sent ange and emillie to tia's side, maybe to help avoid being influenced by the brother's scheme? or perhaps there's further plan?
later tia's group succeed in conquering the dungeon, but after that the brother begun to make his move
luckily now tia is not the only one OP, but the student trio finally gotten strong enough so they can split the task
well, thats what i conclude from reading the spoiler
funny in this kind of story the villain is always male
