Fate Stay Night: The Dark Moon

A boy from our world got lost in a forest and was struck by lightning, when he woke up he found it was an Einzbern homunculus in the nasuverse. His name is Alecsviel Von Einzbern and he will reach Havens Feel at all costs It starts in the third war with creative freedom as it doesn't have anime. Fate/Zero, Fate/Stay Night Havens Feel, Tsukihime, Fate GO OC x Harem