Suzumiya Haruhi no Shoushitsu, Steins;Gate Recommendations
This movie deals intricately with witty character interaction, good character development, and extremely similar elements of time-travel. The animation and art are both great, and the music will really pull you into the show. There are tense moments that will keep you on the edge of your seat, and there will be light-hearted moments where you can laugh. Either way, if you watch either, be prepared for one heck of a ride!
Important note:The Disappearance of Haruhi Suzumiya is only a movie you can only fully appreciate if you have watched the previous two seasons adapted before it.
Both of these series start of quite light and humorous, before the real plot takes place. in both stories the protagonist has to use time travel to change the world to the way it originally was. Going through a lot of mental strain and hardships.
Both Anime deals with time-travel, and the MC time-travel many times just so he can fix/save the world/time he came from, both anime starts off normally but it turns NUTS really quick and there's a lot of twist along the way, both series have amazing soundtrack & character art.......
Over all both anime is one of the best anime I ever watched
The plot lines are extremely similar because they follow a lone protagonist struggling through alternate or distorted timelines. Both shows do a great job of portraying the main character's thoughts feelings as they experience this dilemma. Both are brilliant pieces of work and should be watched not only be fans of Steins Gate and Haruhi Suzumiya, but by any fan of anime in general.
Both shows have time travel and really keep you on the edge of your seat!!
Both involves time traveling in order to restore the world line with very similar scenes that will give off vibes to the other anime.