You're not the main character! (4) / Mage

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

With the new party "Brave Braid" who steadily strengthens his power, Rex begins to capture the hidden dungeon "The Path of the Immortality Straying"! Rex was aiming to increase his power easily by making full use of his knowledge of games as usual, but at last, there was an unexpected event that his knowledge did not reach? Prearranged harmony is going to be true? Another world capture story challenging "absolute power", the 4th installment!