Sworn Enemy Of Lover?

“warning: yaoi content: this manga contains materials that might not be suitable to children under 17. by proceeding, you are confirming that you are 17 or older.” lu xi li, with only 3 months to live due to cancer, unexpectedly meets with his first love in the hospital, chen jun ge. he thought it was fate, but a second later discovers that he already has a boyfriend. 3 months after his sad death lu xi li realizes that he is in the body of his first love’s boyfriend. at that moment he discovers that they are not a couple, in fact they are enemies…the journey to conquest* that man is very long! sworn enemy or lover? / ¿enemigo jurado o amante? ; 重生成恋人的死对头怎么办