After countless wars between humans and demons, the Human Realm and Demon Realm finally made peace.
But fighting continued to break out in some regions. To preserve peace, the Demon Realm proposed an exchange student program between the two realms, acting as guarantor.
Mu Ruoyi, an exchange student from the Human Realm, had long since seen through Ye Xuanye's identity as a Demon Realm spy, but she never called him out.
It was only when the Demon Realm used spells learned from the Human Realm to spark a new war in the southeastern territories of the Xuanhuang Continent that Mu Ruoyi drew her sword beneath the moon and blocked Ye Xuanye's way home at the edge of a cliff.
"You knew those spells came from forbidden texts in the Human Realm, yet you let the Demon Realm abuse them." Her voice was soft, as if stating a regret that had come too late.
Ye Xuanye sneered. "And yet you still haven't killed me."
"Because you have never truly betrayed your own path."
Later, as the son of the Demon Emperor, Ye Xuanye exposed the spies the Netherworld Palace had planted across the thirty-six provinces of the Demon Realm. He joined forces with the Demon Emperor, who had returned from his tribulation, to quell the rebellion in the Demon Realm, end the localized war between humans and demons in the southeastern territories of the Xuanhuang Continent, and restore peace to all three realms.
After Ye Xuanye successfully converted his cultivation to spirit-demon energy, his power surged, and he broke through the curse that made the Heavenly Dao despise demonic cultivators.
During her trials, Mu Ruoyi earned golden merit from the Heavenly Dao for doing good deeds without seeking recognition.
Ye Xuanye and Mu Ruoyi both broke through to the Mahayana stage and ascended to the Immortal, Demon, and Yao Realm.
And so, Ye Xuanye and Mu Ruoyi ended up together.
This story has a mountain of original worldbuilding. Cultivation comes first, romance second. If it's not to your taste, please don't flame me.
Cultivation ranks: Body Tempering, Qi Refining, Foundation Establishment, Golden Core, Nascent Soul, Spirit Severing, Body Integration, Tribulation Transcendence, Mahayana, Ascension
Forty-Nine Heavenly Tribulation: The tribulation for advancing from Spirit Severing to Body Integration, consisting of four ninth-grade lightning strikes
Sixty-Nine Heavenly Tribulation: The tribulation for advancing from Body Integration to Tribulation Transcendence, consisting of six ninth-grade lightning strikes
Ninety-Nine Heavenly Tribulation: The tribulation for advancing from Tribulation Transcendence to Mahayana, consisting of nine ninth-grade lightning strikes
Theme: Set aside prejudice about good and evil, and preserve peace among the three realms.