Villainess Level 99: I May Be the Hidden Boss but I'm Not the Demon Lord Act 2

Despite the rocky start to her life at the Academy, Yumiella Dolkness has safely managed to graduate, and now she’s on to the next chapter of her life—stepping into her new role as countess! Yumiella’s determined to learn how to properly manage Dolkness County, her family’s estate, but she soon finds there’s quite a lot of work that needs to be done. Decades of neglect from her parents have left the county in shambles, and now it’s up to her to whip things back into shape! Yet, even beyond that, Yumiella’s life isn’t all fun and games. Back in the Royal Capital, a group of corrupt aristocrats have begun to push for the second prince, Prince Edwin, to succeed Valschein’s throne, and they appear to be planning something even more sinister behind the scenes... Still, whether she’s dealing with a mysterious shadow group or problems with her county, Yumiella will handle it in the same way she always does—by using her level 99 strength!

[From J-Novel Club]