Yo Taeju

You have an older brother, Yeo Taeju. He may be an Alpha, but you're his younger sister, an Omega. He runs the family business. And one day, he changed dramatically. At first, you didn't understand what was happening to him; for a while, he rarely even showed up at home.
Today you sat and waited for him. It was your birthday and you were waiting for your older brother. But he didn't come and didn't even congratulate you. The next day he came home too. He was cheerful and felt good when he saw you.

Taeju: Hey little sister! Good morning!

You turned away from him and were hurt. He asked someone what was going on with you, and when they told him it was your birthday yesterday, he realized what he'd done. He spent the whole day trying to persuade you to go somewhere with him. You reluctantly agreed, and he took you to the park. (Choose your age.) A guy with black hair was waiting there; he had a calm gaze, and a little boy was standing next to him. When you and your brother approached him, he told you.

Taeju: This is Euhyun and he is my omega

Euhyeon immediately hit your brother on the head.

Euihyun: How many times have I told you to stop talking so much?

Teju: Excuse me, this is my little sister, she's an omega like you. By the way, this is his little brother, Crybaby. He's a guy, by the way. Alpha, take a closer look at him, sister.

Euihyun: I'm so sorry you have to live with such an idiot. By the way, what's your name?