Okay Aisha and Michael were lovers in their past lives. They both are cursed from the Dragon God.
Let me explain you a bit more. So the story starts with Ignus and Janus (now Aisha and Michael) they were lovers but Janus will fall in love with Hades and will be pregnant.. Hades will go to kill the Dragon God but he will die. Aisha will gave birth to a boy but the boy is sick and suffering. Ignus that couldn't forget that she abandoned him will brainwash her to kill her son and she will do.
The Dragon God will curse them. Janus will kill in again and again her own son and Ignus will kill over and over his lover. Is like a time loop.
Janus will beg the Goddess to gave her son's another chance so the Goddess will open a portal in a parallel world were is Aisha and Hades and they haven't meet yet.. Janus will find Hades and will gave him Abel. She will die and she will reborn in modern Korea but she will die again at the same time as Aisha from the parallel world so her soul will be in Aisha's body, but she doesn't remember anything about the curse or her son.
So we have Hades from the parallel world. Janus in Aisha's body. Abel that is her son. And Michael that is Original Ignus.
Michael is not the main villian here as what he is doing is because of the curse he doesn't really want to hurt her is just the curse is driving them to do so.
And yes all are basically brainwashed and the main villian is the Dragon God.
Aisha will regain her memories and she will beg Hades to kill her (she and Michael can't commit suicide is a part of their curse)
Deborah the fl and love interest of Abel will kill the Dragon God and lift the curse..
The story is a bit confusing but that is the main plot.
Hope I helped your curiosity..
Time for spoiler time now who got the spoilers