Volunteer to Join the Onmyoji of Chaldea

At the beginning, the Onmyoji system was bound to the Heroic Spirits summoned by others, but he could only summon monsters. I thought I would part ways with the Heroic Spirits, but fortunately I could hug Daguzi's thigh. But later I discovered that he had just traveled to the beginning of the Fourth Holy Grail War. Then wouldn't he have become an uncle when the plot of FGO started? What makes me most desperate is that Baba Kiritsugu has already set his sights on me. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.