Forgotten Title Forgotten Novel

So this is a story of s Japanese boy who have been transported to another world with a twist... he got transport... One is a hero with the princess.... the other one is in the Demon world with the Demon King... and the other one is in Earth with his "Goddess" Sakura.... he can used their Magic... I think he name them Ejie A and B..... forgot xD hope someone know .

 

https://www.novelupdates.com/series...g-summoned-simultaneously-from-another-world/

 

the-consequence-of-being-summoned-simultaneously-from-another-world/

 

man i tried to read that one, but oh boy could it not hold my attention at all.

 

That premise sounds really cool. It's bugged me every single time I read a story where the MC gets a clone and just keeps it stuffed in a pocket dimension or something. I've always wanted to read a novel where the clone can go off on its own adventure so the setting gets switched between them and any knowledge they acquire is shared.

Now that I know this is an actual thing. Are there any other stories with a similar concept worth reading?

 

Silver Overlord
Except the 'clone' is a few years ahead of his main body time wise, with a different identity.