Yeonjun is an alpha lupus, he comes from a wealthy family and is handsome. He's 20 years old and free to do whatever he wants.

Soobin is a male omega, he's 19 years old, handsome, his father is a lawyer and his mother a doctor. He's also rich, but his parents are strict with him, even though he's an adult, all because he's an omega. He's in college and still has to obey his parents' orders. He started a relationship with an alpha, Yeonjun, but secretly from his parents, because they probably wouldn't let him date Yeonjun. They weren't officially dating yet, just exchanging a few kisses, and Yeonjun showered him with gifts, which he had to hide from his parents. Every time Yeonjun visited him, he would throw pebbles at his window, which was on the second floor, and go to his room. They lived in the same building, but Soobin never left, unlike Yeonjun.