I recommend " May There Be a Next Life That Won't Let You Down " to you. The male protagonist's surname is Jun, and it's an ancient romance novel. The story described how the male and female protagonists once loved each other but missed each other for a lifetime. After transmigrating and being reborn, they kept missing each other. However, in the next life, the female protagonist finally decided to be with him, even if she had to wait until the next life. I hope you like my recommendation.