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A top-tier heroine with a fragile spirit × A sharp-minded, resilient protagonist!!

In the year 2045, humanity is simultaneously invaded by four parallel worlds.

From each country worldwide, two men and two women are selected as "Explorers."

By conquering the dungeons created by each of the four parallel worlds, the Explorers can prevent invasions from those worlds.

Simultaneously, national borders are sealed by impassable barriers, making imports, exports, and the exchange of electronic information impossible.

The only resource capable of saving nations facing collapse is the "magic stones" obtained by Explorers during their dungeon conquests.

The protagonist, an ordinary university student, is chosen as one of Japan's Explorers.

Japan's borders, like those of other countries, are sealed, and with imports and exports cut off, the nation faces collapse.

The magic stones acquired in the dungeons become a vital resource, aiding Japan, and the young man finds himself shouldering not only his own life but also the fate of his nation.

His progress is broadcast live nationwide, and as the Japanese people watch, the young man pushes forward with his conquest of the dungeons—the stage of this war.

His enemies include monsters with formidable physiques, magic-wielding demi-humans, savage angels, and cool robots.

When the young man meets his partner, a girl, Japan's miraculous comeback from the brink of collapse begins!

A heartwarming, gentle gag story, crafted with a light touch and featuring lovable, laid-back characters!

Full of LOVE!