All the characters felt like strangers to me...
I felt quite similar.
All I remember is:
1) Demon Lord divided the world 2k years ago.
2) Demon lord reincarnated.
3) Someone changed history.
4) The sisters are now friendly and twintails has strong eyes
5) Lay is the reincarnation of the ?Hero and his someone held his mother hostage and made him do bad things. Now resolved.
6) Demons went on an excursion to the human/Hero fraction and were bullied. The human teacher had an agenda against demons, and the #1 there along with some clones were used due to some contraption thingo about hero souls and shit that I don't remember.
And now, we have Gods and Fairies. Looks like the Fairy queen was a bit of a pushover, the God is arrogant but not very powerful against Anos, and some senior demons are against Anos.
For me, an old intellectual property / anime was easier to watch an motivating myself to watch something new. I enjoyed this at an average level.
If it's not Isuzu-chan Mii~
All I remember is, MC kills guy with his own heartbeat.
I remember how he kills and resurrects people, which is pretty badass.
Peace.