In Chevron, there are five Kings who possess divine blood and hold dominion over the land. Seiji, who lacks any family except for his younger sister who can read stars, swears allegiance to the arrogant and merciless Azure, the Blue King. However, destiny takes a hand when Seiji meets the warm and empathetic Gules, the Red King, and is stirred by his kind-heartedness. Over time, Seiji finds himself developing romantic feelings for Gules.
Despite this, Azure, who sees Seiji as his possession, refuses to approve of his emotions and instead ridicules them for his own entertainment.