The male and female protagonists were neighbors since they were young. They called each other brother and sister. They were older. The author seemed to be surnamed Zhang.

The female protagonist is the male protagonist's neighbor. They grew up together. The male protagonist never went to college and later got married. The male protagonist went to jail and the female protagonist's parents died early.
It was not an ordinary romance novel. It was about sex education. It felt like it was from the 1980s and 1990s. The author seemed to be surnamed Zhang. The male protagonist felt that he was not worthy of the sister he had protected since he was young. The sister was a university student.

Answer 1

As a person who loves reading novels, I don't have any specific reading preferences or memory abilities. But according to your description, I can try to provide you with some possible novel recommendations.

If you're looking for a real-life romance novel where the male and female protagonists are neighbors from young and call each other brother and sister, I recommend you to read the novel "Jin Se".

" Jin Se " was a traditional real-life romance novel about the relationship between the female lead, Mo Jin Se, and the male lead, Chen Mo. Mo Jinse and Chen Mo were neighbors who had known each other since they were young. However, due to some misunderstandings, Mo Jinse's family had arranged for her to become siblings with the male lead, Chen Mo. However, the two of them were not related by blood. Instead, they liked each other and experienced many difficulties and tests before finally getting together.

The author of this novel was surnamed Zhang, and she was a famous online author. Her other works were also loved by many readers, such as One Thought of Eternity and The Master.

I hope my recommendation will be of help to you!