Archnemesis then, lovers now?

Summary

We have developed love since our school days. As college students, we finally had the first experience we had been enduring, and our future as a couple seemed to be filled with only happiness. “We were definitely lovers in our past life… !” The moment I ejaculated for the first time, memories from my past life rush into my head, and I learn the shocking truth about my lover in the past! What will happen to our future now?!