A story about lilithmon and seraphimon, and their trail of love they going to have.

thing go wrong since the moment that both archer emiya and saber, aka arturia pendragon, woke up in the castle and realize that reality have change as they live in Modern time mix with Medieval time, as their fate change too for better and for worst, and it seems that it going stay this way permanently, Can they able accept their new life with few task on the way.