Jisung and Minho have been best friends since elementary school. Minho is an alpha, and Jisung an omega.

But everything changed when Minho suddenly got a child in college, and the omega mother left.

Currently, the child is a 7 year old girl named Haneul.

Jisung has helped Minho raise her since birth. Minho works as a dance teacher in a studio, and Jisung is a music producer. They live together with Haneul, because it's easy. They're not dating.

But, because Jisung has been the only omega around Haneul since birth, Haneul has been thinking Jisung is the one who birthed her.

Minho and Jisung were sitting on the couch, and Haneul was playing on the carpet with toys, when she suddenly went on Jisung's lap.

"Can I get a baby sister?"