In the desolate aftermath of a nuclear explosion, a wasteland mercenary is reborn into another world, his veins coursing with the blood of giants. Once more, he treads the path of a hired gun—but this time, he is not alone. By his side is a gentle and nimble cat-girl scout, agile and cunning, his most reliable ally. A tender and innocent mushroom girl watches over him in silence, enveloping him in a quiet, protective embrace. A proud and romantic swan-maiden swordsmaiden brandishes her blade and shield, deflecting every hidden dagger that dares to strike.