I think the best way to summarize the effects with two words is, butterfly effect, that is, with the flapping of a butterfly maybe a storm will occur, if you watch this series please pay attention to the small details, this is the most important part to understand everything that happens. This series is a little frustrating but not in a bad way because it helps to make visible certain behaviors that need not be romanticized in reality, when you see it, watch with a critical eye, understanding both parts of the protagonists.