World’s End Harem: Fantasia Vol. 6

In Vol. 6, after returning to Nargala and joining up with Céline, Arc succeeds in stopping the progression of his father’s illness with help from Joanna. Later, he is visited by the beautiful high elf Ferraris, and after learning that her hometown is under attack, he decides to help her find a clue that will prevent the disease from spreading further.
Notice: This book is written in Japanese.