I tried really hard to search it by myself but I didn't have any luck.

I think it went like this. It was a manga about this boy whose childhood friend (?) was erased or killed by god. And when he tried to say her name a giant eye in the sky was watching and prevented him from talking. Then a girl (best girl) that looked a lot like pic related joined and helped him, trying to figure out what is going on.

At the end of the manga, it was revealed the world was a simulation, the MC was an AI (?) created using the memories of a old man that was the real world counterpart of MC. And he created that world so he could be reunited with his childhood friend that was in a coma or something. Oh, and the blonde girl was a robot in the real world. It was kind of a stupid twist and ruined the story.

I'm not sure when this manga started but I think it ended in 2019-2020 and had about 40-60 chapters.

Thanks