After the death of his adoptive father, young Siro Emiya lived alone in a huge manor. He grew up as a kind, hardworking, and practical 16‑year‑old boy, so he was surrounded by the care and attention of two girls – his younger school friend Sakura Mato and his teacher Taiga Fujimura, formally a guardian but in practice more like an older sister. Everything fell apart when Siro learned that his hometown Fuyuki is the arena of a magical battle for the Holy Grail, which repeats every few generations. But the world is accelerating; only ten years have passed since the last war – and the time for a new one has already come. According to ancient laws, the "royal battle" is fought by seven Master‑mages, each of whom summons a Servant – one of the eternal heroes from past or future eras. The last remaining Master receives the Grail, the greatest treasure that grants any wish. There are no rules; the end justifies the means; yesterday"s friend can become an opponent and betray without hesitation, strike from behind. Upon learning the truth, Siro faces a heavy choice – to leave, to renounce the fight, or to risk everything on his modest (as he thinks) magical gift, a burning heart, and a desperate desire to save everyone dear to him. But the final drop on the scales of honor and courage will be the green eyes from a distant past, shining that very night…