"I'm pregnant."
"Kyun-woo, I'm an omega...?"

Before Gyeon-woo appears Ye Jeong-won, someone who has been like a younger sibling to him since childhood.
The two end up having a one-night stand at a freshman welcome party after drinking. Later, Jeong-won reveals that he’s pregnant.

Omega Gyeon-woo, having no memory of that night, is shocked — but soon pulls himself together and says he’ll take responsibility for Jeong-won and the baby.
However, when Gyeon-woo tells him to move into his house, Jeong-won gives a meaningful smile.

“Hyung, even if there’s no baby, I’d still like to live with you.
Because the whole ‘I’m pregnant’ thing was a total lie.”