死にゲー世界のモブに転生した俺は、外れジョブ【ヒーラー】と原作知識で無双する

The classic romance-action RPG Dungeon Academia is infamous as a brutally difficult “death game.” Reincarnated into that very world, I—Allen—find myself as a mere background character with the weakest class: “Healer.” At this rate, I’m destined for an immediate death route. However, the extensive knowledge I mastered in my previous life begins to overturn fate. By turning healing magic into a weapon, Allen rises toward becoming the strongest in the world. An isekai power-up fantasy of reversal and growth begins!