Tokkyu Tansaku Shi He No Kakusei Oni to Naru Mono 4 (Beat's Comics)

[Machine Translation] Now, we will overcome the test with everything we have! No matter what kind of power you have in you, you can't win alone. A "dungeon" suddenly appeared in modern Japan. The people who challenge this unknown space, knowing the dangers, are called "searchers"....... In order to search for his parents who went missing in the dungeon, a high school student, Tenjou Tenji, who aims to become a professional searcher, went through a life-threatening ordeal and became able to use the power of "Underworld" and "Onijin-ka" for a short time. When Tenjou and Himou appeared on the battlefield, it seemed that they had just about stopped the invasion of the "Hell Beast" into the outside world, but...? The weakest and most gifted boy becomes the strongest and most peerless explorer...or rather "demon"! A new royal road, modern dungeon fantasy!

今、全てをもって試練を超える!!「どんな力が宿っても一人じゃ勝てないんだ」全力vs全力の死闘、遂に決着!!現代日本に突如現れた《ダンジョン》。危険を承知でその未知の異空間に挑む者達を人は《探索師》と呼んだ──…。ダンジョンで行方不明になった両親を捜すため、プロの探索師を目指す高校生・天城典二は命がけの試練を経て《冥道》と《鬼人化》の力を少ない時間ながらも扱えるようになった。決戦の場に現れた典二と緋鳳は寸でのところで《獄獣》の外界侵攻を阻止したかに見えたが…!?　最弱無才の少年が最強無双の探索師…いや“鬼”と成る！　新王道・現代ダンジョンファンタジー!!