Null Peta

Protagonists are using the virtual world to meet/help a person who's unavailable in the real world. Their quests both have plenty of adventures, heartwarming and heartbreaking moments. The overall tone is different though: Null Peta leans towards childish comedy at least in its first half, Hello World is more dramatic/realistic. 

-Kind of the same concept with the whole "mc is alone in the world" thing but Null Peta makes it as a bigger plot twist -Both have a lot of emotions but Null Peta has a happy ending while shelter has an open ending -both mc have a special someone(special someone: NOT in a romantic way) who built the world for them -The only difference is that Null didn't realize till much later that she wasn't in the real world Null Peta have 12 episodes, every episode is 6 min long. When all the episodes are combined its is 1 hour 12 mins, soooo.. kind of like a movie while shelter is just a 6 min music. read more 

Now when you see this recommendation you might be asking yourself, "What the **** is Null Peta?" Well, it's a heartwarming slice of life anime about two sisters, one of whom is a robot. Now, I know what you're thinking and it's, "How the **** is that similar to ****ing Attack on Titan, a show about people being eaten?" The answer is simple really. It's not similar in the least. However, they do have common themes like the value of life and what it means to be human. You know, the sort of themes that make you think. They also have fantastic stories about characters that you really start to feel for. read more