Story
One night on the mountain Cheongwol finds Han Seojin standing over the bodies of bandits; to survive, he passes his cellar off as «a place for taming inner demons». Despairing of controlling herself, she comes to him of her own accord — and his games, alternating shame with the long-awaited «good girl», bring her peace for the first time; her swordwork straightens out, and the Head marvels at the change.
She grows ever more attached: she chases him to Chengdu disguised as a courtesan; she rejects recruitment by Yeongcheon and the Demonic Cult; she is jealous of Tang Soran. The pivotal turn is that she refuses to kill and promises him to stop, thereby leaving the path to the Seven Heavens. On Mount Sun she breaks through to Peak level, reveals her true name Chaeha to him, and swears to be his.
When Dugu Chinmuk buries Han Seojin alive, Cheongwol blames herself and will not leave his side. In the finale she joins the Hidden Dragon Society, reins in her bloodlust for the sake of her word to him, and crosses ever bolder into forbidden intimacies, fearing only one thing — that she might become unwanted.