Opposites cannot coexist together. That was the universal rule of every world.
But there were those who opposed that very idea. The absolute rule that made up the universe doesn't matter to these individuals. If they could be together, even if they are the total opposite, they would oppose even reality itself just for their happy ending.
Two entities of higher power descended from beyond to the two mortals whose status in life were like heaven and earth. Due to a chance encounter that...
A classic love story, boy meets girl, boy and girl date, boy tries to elope with girl, things go wildly wrong- like bonkers-crazy-somehow-ending-in-three-people-triggering-at-the-same-time-and-one-of-them-is-the-boys-sister kind of wrong. Boy flees town like the little bitch he is.
Girl and sister date? Yes. They're also going to kick the boys ass. See! Basically a meet cute.