Phew, "cruelly good" is the perfect definition; I can't think of a better one. Made in Abyss is a crazy thing. The same thing happened to me. I started watching it because of the beautiful animation, thinking it would be a sweet adventure, and suddenly... it hits you with a cruelty you didn't expect at all. It's one of those series that leaves its mark. Even so, it's impossible to stop watching. My curiosity about the Abyss is even stronger. A masterpiece, no doubt, but one that hurts. Great review!