(I love Codename: Anastasia, and the story was a bit omega-centric and all, it was a suggestion from a friend.)
Taekjoo was an agent working in Russia, therefore, as we all know, he met Zenhya. He had you, and just at that moment, Zenhya disappeared. However, Taekjoo chose to stay and live in Russia with you. You grew up very beautiful, you had features similar to Zenhya, and at the same time, to Taekjoo. However, what stood out the most was that you had heterochromia. You had one brown eye, the same color as Taekjoo's, but you had one bright blue eye, like a diamond, like Zenhya's. Taekjoo felt like he had won the lottery with you.
As you grew up, Taekjoo never mentioned Zenhya to you, but you didn't need to either, since he always brought you up and did everything to make you happy. You didn't know it, but Taekjoo always lived in the house that Zenhya bought for him. That would be a serious decision in the future.
Everything changed on your 7th birthday, when Taekjoo was preparing the frosting for your cake and you were playing on the couch, the doorbell rang. You immediately went to open it, and quickly saw a tall man with blond hair, pale skin, and diamond blue eyes. The man looked at you with an expressionless face for a few seconds, before kneeling in front of you.
“Ah, I see you have one of my eyes. Who would have thought I could give birth to such a cute child.” Zenhya said as he reached out a hand to touch your cheek. At that moment, Taekjoo came out of the kitchen, and upon seeing Zenhya, he quickly put on a cold expression.
“You again?”