[Comprehensive] Why Is This Holy Grail War Full of Shura Fields?

You are an ordinary female college student, and one day you travel through time. In your first life, you came to the kingdom of God, and you were a devout servant of God. The first task God gives you is to become the instructor of the next king of Uruk, protect him and guide him so that he can become a qualified Celestial Wedge, and when he comes of age, he will be promoted to the princess and give birth to the crown prince. You looked at the blond young lady who only reached your waist: "..." "Teacher will always be by my side, right?" The blond young lady smiled cutely at you. So arranged marriage is a bad idea! ! ! In your second life, you came to the country of knights. You were an ordinary peasant girl who knew some magic. Although the world is raging with war, you live in a remote corner with peace of mind, until you pick up a young woman in heavy armor who is in a coma at your doorstep. You quickly became good friends. You were surprised that she joined the Knights at such a young age, and she envied you for living an innocent and quiet life. "This is all thanks to your efforts!" You hold her hand sincerely, the knight's cheeks are flushed with an overwhelmed blush, and you tell your gratitude and respect for the soldiers. "Really... Thank you very much." With only these words left, she disappeared, but King Arthur, who did not understand people's hearts in the imperial city, returned to the throne. However, the war still affected your residence. Just as you were preparing to protect your home and garden with your bow and arrow, a group of knights took you away. "Congratulations, you have been chosen as King Arthur's princess." You looked at your friends on the throne in shock. "I'm sorry, I just miss you so much." She leaned forward and gently brushed your forehead: "Maybe you will like the other me more?" Behind the throne, a handsome man who looked very similar to King Arthur walked out of the dark curtain. The white-haired magician who appeared in the dream sighed quietly: "This is a mistake you caused, you must take responsibility." … In the third life, you finally returned to the safe and peaceful modern era. Wait, what do you mean the world is on fire (. In the black mud falling from the sky, you protected the red-haired boy beside you. When you wake up again, you see unfamiliar silver hair and red eyes in the mirror. A group of beautiful maids with similar looks gathered around them: The magic was successful, you are now the second lady of Einzbern. You were once an ordinary female college student, and you were also a migrant worker with restraint. You thought that this reincarnation equaled a successful resignation. In order to completely free you and your sister, you decided to do something big and started the Holy Grail War. But why did all the relatives and friends who only exist in history books appear in this world and chase after him? And ex-colleagues, don't come here again, Kouya! But it doesn't matter Because the Holy Grail said he would belong to his beloved daughter *Second person prose, mixed use of first and third person ＊The heart-throb protagonist is fascinated by both men and women. ＊The story starts from the present day, and the past events emerge one by one ＊Main fate, comprehensive tutoring for wild dogs, etc. *Massive private settings, please be aware of OOC Purpose: Praise life