"Dilya, let's become family." Dilya, a mercenary who does not know anything about family or love, spends a night with the King of the Golden Wolf Clan, the enemy kingdom. Supposed to assassinate the king, he instead receives so much love that he finds it hard to leave his side. 6 years later, as he's living and raising the king's child in secret, the envoy of the king's younger brother, Yudha, suddenly comes. "I have never been loved, so I don't know how to love." This is when Dilya's lonely life begins to change!