Hyougetsu 
Der Werwolf: The Annals of Veight Volume 13 [EPUB ebook] 

Having been selected to join Meraldia’s delegation, Friede, Yuhette, and Shirin make their way to the frigid Rolmund Empire to meet with Empress Eleora. Once there, she encounters Eleora’s niece, Micha, and the two become fast friends. One day, while they’re exploring the capital, a group of people plotting Eleora’s demise abduct Micha. Friede tracks them to their hideout, and soon realizes that she won’t be able to count on backup. Alone, she infiltrates the enemy base in order to save her friend.