I enjoyed the initial chapter (paradise). I thought it interesting that the 'refreshing' (of memories) is what leads to the humans immortality, it appears the succubus caved immediately upon being confronted with the hypocrisy of her manner of enthrallment, where I'd have expected her to have an internal justification for denying their freedom.
Could see a plot where a different succubus uses the MC as a hostage, where out of love the enchantress relinquishes her power in exchange for your freedom, then a redemption ark where she's a companion, being shown the issue in her ways, then a confrontation where self determination enables them to overcome the other succubus.
Do checkout some fun topics:
hollows from Dark souls, replicants of bladerunner. Maslow's hierarchy of needs.
youtube videos:
"The False Horror of Immortality"
"Fable of the Dragon-Tyrant"
meaning is not derived from the finite nature of our existence, to wish for more time is not wrong or evil.