Concrete Revolutio: Choujin Gensou, Occultic;Nine Recommendations
You might be surprised to see ConRevo as a recommendation for Occultic;Nine (and vice versa), but please give it a chance. Both series are of the sci-fi/mystery variety, extremely confusing, fast-paced, but clearly smart, have a great voice cast, fun OST, and vibrant visuals. If you don't mind being confused from the start and have enough patience, attention, and analytical ability to follow the plot, you will enjoy both Occultic;Nine and ConRevo immensely. Once you get the whole picture, you can't help but feel excited and see just how cool these shows are.