[Cultivation + dual protagonists + coming-of-age + gradual growth + not a wish-fulfillment story + vast xianxia world]
An accident causes Yu Xuesi's consciousness to be captured by a cultivation game called Records of the Spirit Abyss, making her its only player. She chooses Lu Yuncheng, a boy with a tragic past, as her main character, giving him quests and controlling his fate.
But as she watches Lu Yuncheng struggle and grow on the path to immortality, everything seems far too real, and Yu Xuesi begins to suspect this is no game at all!
Escaping this prison of reality and illusion may take more than peerless immortal arts. It may also require facing yourself. Can they save each other, unravel the heavenly mystery, and join hands to attain immortality...
(Doesn't follow popular conventions completely; includes many original settings.)
[A quick heads-up: I chose historical romance and fantasy romance as the categories because these are the few tags available to female-oriented fiction that fit a cultivation story. The romance may not take up much of the story!]