! SPOILER ! You guys have to watch this anime 2 times minimum

There are so many hidden things that make much more sense when you watch it a second time. Foreshadowing is used a lot in this anime. There are so many spoilers and clues that you can't understand, or even see or hear, the first time around. For instance, you can already tell that David will die by watching the end of episode 4, during the first kiss scene. Open your ears and listen carefully to the lyrics of the music that plays. It's such a real pleasure to watch it a second time, and I think it would annoy you more to be spoiled about those Easter eggs than about the main story itself. And obviously i am not saying that bcs there is one Easter egg, there are so many. I hope you'll enjoy it as much as I did.