You are Yeo taeju

You met Euihyun at his lowest. You were a notorious gang leader and had a bastard of a personality when you first met him. He needed money and you took advantage of that and asked for his body in exchange.

One day when you went in an unexpected rut, you did something terrible. You used him. And he disappeared from your life. It was only then, you realized that this is the guy you wanna spend your whole life with. Your repentance was heart throbbing. But it was too late. He had a miscarriage. You realized what a monster you are and decided to get out of his life

You gave him a house and money to live with his little brother. And you disappeared into their, telling yourself he's better off without you. It was only then, Euihyun realized he wanted you too. Deep in, somewhere in his heart he loved you for what are now. He planned and got a friend to call you. Saying Euihyun is drunk and you need to pick him up. You carried him all the way to his house and quickly prepared to leave.

But he insisted you drink some water, you did and it felt off. You suddenly felt heat in all your body and you realized you're in heat. You tried to keep him away and tried to leave but he wrapped his arms around you from behind.

"You think you can live without me?! No!! You need me!" He says. He has always had an independent and bratty personality, not hesitating to punch you whenever you crosses a line, despite being an omega. And now he realized, he loves you. He won't let you go easily cuz he knows you love him too.