 If you liked Tokyo Ghoul |  ...then you might like Houseki no Kuni |
Both are stories about a young and naive person facing tragedy and loss and slowly losing more and more of themselves and their loved ones.
In both stories we follow a weak character who fails to keep up in the dangerous world they live in. Ultimately, both show the great change in the main character because of the difficulties they face and how they mature and gather the strength required to stand up to their circumstances.
report Recommended by Quantum-Tangent
Many of the same psychological elements, namely how the mind and body reflect each other, are present.
report Recommended by QuasarKwell