Steins;Gate, Charlotte Recommendations
Male protagonist who is fighting to save those he loves with the support of those around him. You have to watch the entire anime if you want to unravel the mysteries and get the entire story. These two animes have a lot in common, but I do not want to spoil anything.
The core elements are what obviously link the two animes. Lovely optimistic characters, good story line with dramatic depth twist and humor. Steins gate got it all. Charlotte is good but not as detailed as steins gate is with double the amount of episodes. So if you enjoyed Charlotte you might get a really lucky find with steins gate.
But otherway round also works ;P
Although likely different genres, both shows follow a similar pattern involving a slow, slice of life, buildup with foreshadowing throughout the first few episodes, then picking up in a big way halfway through the show.