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Does anyone this manga the mc is an aristocrat daughter and wants to have a normal power and in the ceremony she got a unique power it's kind of like a box and she can expand the inside of the box one day the mc needs attend a party by a prince however she attends it as box kinda like she was inside the box and that box was put into the party so she can observe it while inside bec. She's, afraid of people due to the bullying she had experience from an aristocrat lady during a ceremony when she was a child. It's kinda vague but in that party she was able to save the prince from poisoning due to her observing inside the box the prince then got curious of what's inside the box so she invited him curious on what the mc is face looks like the prince kinda get excited however when he entered the box the mc put a horse mask.