"Fifth Miss, if you have no spiritual root, does that truly mean you'll never be able to cultivate immortality?"
"Cultivate immortality? What a load of crap!"
"Cultivation is a dead end!"
The overworked Gu Taiyi gets lucky and transmigrates to the cultivation world. With no spiritual root, he has no chance of cultivating immortality. He plans to be a lazy couch potato for the rest of his life, but on his wedding night, an immortal maiden's Nascent Soul takes over his body.
At the critical moment, his heaven-defying constitution erupts. The immortal maiden fails to possess him, but instead creates a strange state of partial possession. From then on, two souls share one body, tormenting each other and forced to coexist. With no spiritual root, he'll follow the path of demonic cultivation instead.
Not bad. The protagonist is quite responsible. Although he looks like a ruffian, he does what he needs to do and his ideas are quite unique.