 If you liked
Steins;Gate
|
 ...then you might like
Boku ga Aishita Subete no Kimi e
|
Both requires a brain to understand - requires you to like the concept of different timelines or parallel worlds due to our actions. But instead of full 100% Sci-Fi, Boku Ai and its counterpart Kimi Ai focuses more on the romance side of things. Love and parallel worlds. Steins;gate x Makoto Shinkai basically.