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