Gendai no Saikyou Heishi, Isekai Dungeon wo Kouryaku Suru

Hasumi Ryuuji, the man called “the modern era’s strongest soldier”, someone who can make numerous difficult strategies a success, was transferred during a mission into the depths of another world’s dungeon. A “heavenly voice” echoed inside his brain guiding him — “Welcome, the hero from another worl