The Transmigrated Little Medicine Immortal

[Sweet romance++Both are each other's one and only] A 21st-century female medical researcher has an accident during an experiment and transmigrates to ancient times, where she falls into a passionate romance with a prince.

“Do you know you promised me we would be the only ones in each other's lives, for all our days?” Su Jingmo asked coolly, but waited in vain for an honest answer from him.

Nangong Ling replied, “You know that taking a secondary consort was never what I wanted.”

Su Jingmo trusts him, of course. In the end, the two of them retreat to the mountains and forests, where they live a happy, sweet life together.