This story is for eimiko shippers only, those who dislike the ship, don't read this, I did this story for fun but might continue a series for this since its my first time.
Yae Miko tricks Ei to leave her Plane of Euthymia, to take her to a festival. And after some persuasions the Archon agrees to stay. And their eternal love blooms at that festival's firework show.