Some time has passed since Rex was entangled by the tendrils of the Eternal Curse.
Rex was first introduced to the Eternal Curse in the bathroom of Faraday University, right before the start of his first inter-university tournament. It came suddenly and unexpectedly like a tornado.
He experienced no indication that he would be bound by its power.
Unlike the symptoms of a sickness that gradually worsened, he was hit bluntly by its effect.
It puzzled him ever since.
Naturally, equipped with the power of the System, he inquired about the Eternal Curse, only to be confronted with a ridiculous price that he needed to pay. Due to adversities that came one after the other, he put the Eternal Curse in the back of his mind.
Just like that, the Eternal Curse remains a mystery to him.
Soon he learned that he was bound to the Vampire Princess, Calidora Blodirra.
He was confronted with the truth by her.