Ministry of Magic and the Holy Grail War

As the best Auror at the Ministry of Magic in London in recent years, Suemitsu was appointed as an exchange staff between the Ministry of Magic and the Clock Tower and came to the distant Fuyuki City to participate in the Holy Grail War. As the best magician in the Ministry of Magic in recent years, how should Suemitsu face the cruel Holy Grail War? The heroic spirit summoned by Yu Moguang doesn't seem to know where he comes from or who he is. He doesn't even know about the Holy Grail War. His existence is as elusive as the flaming sword in his hand. Will he regain his memory in the next battle? And what kind of danger will he encounter with Yu Moguang?