Time moves way slower in the God realm than the Planet Seiya is supposed to save. If so, why, when the first villain, the demon general or whatever, threatened to kill the little girl's dad while Seiya was doing push-ups, it was happening as if time was moving at the same speed. So Seiya is doing push-ups while the demon is talking to the little girl as if time flows for them the same way it does for Seiya if 10 minutes is 16 hours. The goddess opened the window to the planet to see what's happening, and the demon was speaking, but not super slow, so how is time moving slower?
Yeah nah, from my experience with the author's other work
Kyuukyoku Shinka Shita Full Dive RPG ga Genjitsu yori mo Kusogee Dattara
he makes really solid premises with that one big plot hole.
I'm two years too late, but this is how I interpret it:
Time moves slower in the God Realm compared to the human realm, but when someone from the God Realm opens a window to communicate with the human realm, the two realms "collide" (actually "connect" would be a better word) and their respective time moves at the same speed. Once they're done, the two realms disconnect once more and God Realm's time slows down.
Hope my explanation helps someone in the future!