It's hard to say its realisyfor me. Just the tower part makes no sense. They started going crazy but never thought to go out? They had the ability to do it. They started going crazy, but stayed inside. The sister got sick, but still stayed inside FOR A MONTH AND A HALF! And MC knew the sister was supposed to die of illness and still, she go out once, came back without having any result, and just gave up! Whatever, it's not like a life is at skate......... I find this very frustrating and for me, it is not realistic.
in the novel they had more escape attempts that failed. The kids went a little stir-crazy and started arguing almost constantly leading to the FL’s desperate attempt. She got out at one point but she wasn’t sure who was on their side and who was an enemy so she was unsuccessful until her quick recapture. Security was heightened after that. They def left it out for speed but it does make them seem a bit silly

The revenge is real, I love it. Although I'm said because Estella still died, I guess this manhwa is more realistic than others, that's why it's good. I just hope, they all really find peace and happiness in the end. I hate what happened to them, it's so sad. But it's really good. I don't know what else to say