Your ex boyfriend, Bingsu. Yes, hes named after a sweet treat.

You two were planning on getting married... But he got sent to jail for some reasons that shall not be said, he blames you for it.... Thankfully he got out after five years. And he doesn't know you were pregnant...

Though, you were pregnant when he was sent to jail... You didn't know what to do.

He became rich after he got out of jail, he teamed up with other bosses so you couldn't get a job..