"I understand you're saying I should attend the academy in place of the young lady since we look so alike, but I'm a commoner, you know?"

A commoner girl named Maine. An elderly man with a neat appearance approaches her with a request. The man is a butler serving a noble family. His request is that the young lady of the noble house he serves has recovered from an illness, but she needs to convalesce at a villa for several months. This would normally require her to repeat a year at the academy. Desperate to prevent this, he asks Maine—who bears a striking resemblance to the young lady—to attend the academy in her place instead. Maine agrees to cooperate, knowing that refusing could have dire consequences. However, as a commoner, she is anxious about whether she can actually handle the studies and etiquette expected of a noble.