I don't think this is exactly DID but I also don't think its three Gods. I mean all of them ARE Mugo, not different gods.
I think the author wanted to do an in between with Mugo having three versions of oneself in different points of age, and by some phrasing from the evil one its kinda implied that they appeared through time and not that the three fused in one body or smth
WAIT let me explain myself with what i meant by implied Σ(っ°Д °;)っ the switches between the personalities are similar to that of DID and like just the different "roles" between all three personalities just reminded me of that. i am no expert about DID and it just reminded me of what i saw irl ╥﹏╥ now looking at the replies I think the explanation by sun_bae makes more sense than mine ( ̄∇ ̄")personally the story to me still seems like it's researching off of DID but i agree now that it's NOT DID or a dissociative personality disorder but rather a god with different forms (=・ω・=)
in the other manga with Beom they were both mad horny for each other and appropriate… but I just don’t know what the fuck this story is. It’s giving wanting to fetishize real conditions without actual research… and me and the besties are concerned. It’s wild reading an omegaverse where that’s not the reddest flag