This is mainly about how they reincarnated and The dragon was long looking for his mate(Main Lead) but he had forgotten him and so the main lead stepped up for his sister and ended up actually being his mate and you do get a preview of their past before they reincarnate.
It’s an omega-verse, I truly believe they’re fated pairs. This one is unique since the omega doesn’t seem like one at ALL, lol. They do hate each other at first but grow fond of each other eventually.
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Dawn of the Dragon