Furitsumore Kodokuna Shi yo (2024)

Both series have a dark atmosphere and deal with quite a few sensitive issues. One of their main themes is child abuse and neglect and in both cases the protagonists have very complicated pasts.

Influence and A Suffocatingly Lonely Death deal with sensitive issues and have similar themes like child abuse and revenge. Both series share a similar dark atmosphere and their main characters are pretty complex.

These are their similarities:
1. Both a not episodic mystery drama.
2. Involves guessing of who is the true killer.