Hehehe, I recommend you a novel called " Online Games: Full Defense at the Beginning, Transforming into a Mobile Fortress ". This novel was set in a virtual online game. It told the story of a game player who had full defense at the beginning of the game, but unexpectedly activated the heaven-defying meat shield skill and became an impregnable humanoid moving fortress. It has the same " fortress " element as the black deacon Doujinshi novel Fortress Summer! I hope you like this novel.๐