The Strayed Dungeon, "Cemetery of Oblivion", where the first Virtual War of the A-1 Class of the First-Year had transpired in the first semester, was just an ordinary dungeon for the one who had written about it in his unpublished novel, which he considered as a failure. However, as time went by and as mysteries continued to pile up and haunt him, he learned that such a dungeon possessed one of the mysteries that might be related to his reincarnation.