Baron's daughter Chelsea was persecuted by her mother and twin sister. Every day, she is forced to clean before dawn and receives corporal punishment such as being whipped and deprived of some meals. Suddenly, a turning point finally came for Chelsea who was living such a life. A skill appraiser originally called for her sister unexpectedly determines that Chelsea has awakened a new kind of skill! Since her sister also need more control training for her skill, they were both sent to live at the Skill Research Institute in the imperial capital. Now that she got the chance to leave home, she will never come back! Also, since she was persecuted before, it's obvious she needs to repay the favor, right?