MC has his memories, ML doesn't. In that arc where he killem Mc's friends and had to reset the world and erase MC memories, it seems he used too much power and this caused an error during his passage to the next world, so came back to not remembering the MC in the following worlds.
That might be but right now in this new arc he doesn’t recognize him, usually something triggers his memories to remember the ML. As for the ML idk if he has his memories, since as the dark god he was already favoring our MC and calling him little toffee, so idk it seems like he might’ve had his past memories?
A little surprised no one seems to have memories of the other in this arc, but it’s always fun to see them fall in love again so I don’t mind