 If you liked Mouryou no Hako |  ...then you might like Bungou Stray Dogs 2nd Season |
These series feature an atmosphere of somewhat mature darkness that centers around a mystery theme. Most of the main characters are male, and the aesthetic style is very similar. If you appreciated the style of Bungou Stray Dogs and wished it took the mystery theme further, give Mouryou no Hako a try. However, Bungou Stray Dogs is considerably more action-oriented and Mouryou no Hako is more dialogue-centric with horror elements.
report Recommended by Valkyrie_Wings