Bullied by My Master, I Overthrew My Ancestor [Reborn]

[Before you start reading: 1. The author hasn't read A Record of a Mortal's Journey to Immortality, so please stop bringing it up in the comments. I really don't know anything about it. 2. This is a romance story dressed up as cultivation fantasy, so please don't get the wrong idea. Thanks.] In everyone's eyes, the eldest senior disciple is honest and hardworking. But deep down, he has always harbored one ambition: to screw his master to death. The story should have gone like this: Master: Your aptitude is poor. You need to work twice as hard. Eldest senior disciple: I will heed your instruction, Master. But then the story took a sudden turn: Eldest senior disciple, with a different soul inside him: This move isn't hard. Master, try a little harder. Master: You little demon! Get off my bed! An abstinent, aloof master as the bottom x an eldest senior disciple who transmigrated and was reborn, outwardly honest but actually a lecherous, scheming top #Every honest person has a secret side# #You ignore me today, and tomorrow I'll leave you bedridden# #Oh my, the eldest senior disciple has gone dark!# Top's POV, 1v1. Current cultivation levels, each divided into early, middle, and late stages: Qi Refining, Foundation Establishment, Golden Core, Nascent Soul, Out-of-Body, Spirit Severing, Void Insight, Great Ascension, and Tribulation Transcendence. Ongoing story: The Demon King I Killed Has Come Back for Revenge Completed story: His Majesty and the General Are Arguing Again Theme: