I think the novel Waiting for You, Love Me Again fits the question very well. The male protagonist was a technical soldier and the beloved of the female protagonist. However, due to an accident, he became a vegetable. After taking care of him for many years, the female protagonist left due to some hidden reasons. Five years later, the female protagonist decided to come back to face everything and end everything. I hope this novel can meet your needs. If you need other recommendations, I can also recommend some more to you.