俺と君達のダンジョン戦争

In the year 2045, Earth was invaded by four different worlds.To defend, it is necessary to conquer dungeons connected to each other world.Each country selects an ``explorer'' who will be responsible for this, and Gunma, an ordinary man selected by Japan, is suddenly thrown into the forefront of the attack!I was freaking out, and while I was activating my Listening and Enemy Search skills with excessively heavy equipment, I met the most beautiful girl in humanity!?While being swayed by her too strong and crazy-minded girlfriend, he proceeds to conquer the dungeon with her unbelievable momentum...?A never-before-explored dungeon fantasy that slowly knocks everything down!