Uchi no Heika ga Shinmai de.

Princess Shuka of the Red-Summer Kingdom has spent her entire life sheltered within the secluded walls of the inner palace, far removed from the harsh realities of governance and politics. However, as she nears her fifteenth birthday, a sudden and devastating outbreak of disease sweeps through the royal family, claiming the lives of her father and brothers one by one. With the throne left unexpectedly vacant, the kingdom is thrust into a desperate search for a new ruler to guide them through the crisis. Thrust into a world she barely understands, Shuka must now shoulder the immense burden of leadership despite having no practical experience in statecraft or command. Fortunately, she is not entirely alone in this daunting endeavor. Zen, a dedicated military officer who serves as her personal retainer, steps forward to offer his unwavering support and guidance. Together, they must navigate the treacherous political landscape and the overwhelming expectations placed upon a young princess suddenly forced to become a monarch. As Shuka confronts the steep learning curve of her new role, she must find the inner strength to protect her people and prove herself worthy of the crown she never expected to wear.