This manga is an amazing thriller, with lot of world building, time jumping, charming characters, beautiful art, and a deep and complex story full of mysteries that are discovered chapter after chapter. I'll say that maybe for some ppl the story advances too slow at some points but for me it was all i expected and never feelt it was slow, i read chapter after chapter eager to see the next discovery. I loved each one of our protagonists, you can feel their emotions at every moment when dealing with this whole friend problem and you see them growing all over the series.