Nuclear Sword Immortal Starting from Type-Moon

Seven-year-old Chiki Shirou, transported to the Fourth World War era of Type-Moon, only wants a peaceful life.
Mystery, the Holy Grail War, Heroic Spirits, Magicians—this world is fraught with danger, where a single misstep can lead to sudden death!
After recognizing his own weakness and powerlessness, Chiki Shirou abandoned all illusions and decided to stay away from the Holy Grail War.
However, blank class cards, Unlimited Blade Works, Heroic Spirit power, the Holy Grail War... a series of events followed one after another, setting him on a path of no return to become a nuclear-powered swordsman!
The Age of Gods Britannia, The Witch's Lingering Fragrance, Knight Princess's Heavy Dependence, The Wizard, Magical Girl, Gift, Star God—
More and more bonds are forming!