Not Enough Talent? Mecha to the Rescue

Yu Chen unexpectedly transmigrates to a cultivation world. Despite his mediocre talent, he manages to win his senior sister's favor. But when he fails to make a breakthrough for a long time, she starts putting pressure on him. He hates being pressured under the pretense that it's for his own good, so over time he grows to resent the senior sister he once liked. His master's wife, however, is always gentle and kind to him. Faced with such a stark contrast, Yu Chen's heart turns toward her. The two become lovers, but because of their relationship, they have no choice but to flee Tianyu Sect. Later, they encounter his master's wife's old nemesis from her youth. Having neglected her cultivation, she is no match for her, and after being toyed with, Yu Chen dies at his master's wife's hands. But he uses the Time Core he obtained to turn back time, returning to two years earlier. His master's wife wants to change this outcome and take revenge on her nemesis, so she begins pursuing Yu Chen and cultivates the techniques she once refused to practice.