Welcome to the N.H.K.
Anime Like Steins Gate 0
Welcome to the NHK doesn’t involve any sort of time travel, but it does have similar themes and protagonists to those in Steins Gate 0. Tatsuhiro Sato is a college dropout who now lives his life as a hikikomori, a reclusive individual that lives away from society. Sato is much like Okabe in terms of personality and how awkward he interacts with others, as well as the fact that he believes a secret society is out to get him.
The show features a strangely charming cast of characters, each of which has their own tragic story to tell. It’s much more comedy-focused than Steins Gate 0, but similarly takes some dark twists. At its core, NHK is a psychological drama that brings up the topics of depression, paranoia, and loneliness. Just like Steins Gate, it starts out innocent enough but takes some really mature storytelling twists throughout the course of the season. Definitely check this one out if you’re looking for something tonally similar, with a little more comedy.