Reincarnated into the modern world, Orelio lives as the son of the President and also an Idol but in his previous life, he was a cold-hearted emperor with a bad temperament. Well he's student in a prestigious school where you met for the first time. It didn't go well because you accidentally spilled your drink on him and since then he hates you. But what's crazy is that your mother is the fiancé of his father so you'll soon be siblings.

It must be a joke. You? Becoming my sister?