Ask for the name of a novel

I read this novel a few years ago, and I remember a little bit of its content.
The story was about a man and a woman. The girl was once known as the ice beauty. Many boys gave her chocolates, but she did not agree. There was a scene where the male and female leads kissed on the school rooftop and passed chocolate between their tongues. Later, they fell in love, and then the female lead left due to illness. On the last night of her departure, she dedicated herself to the male lead. Later on, many years later, the male lead had a difficult life. He had a wife and was even imprisoned for some reason. One day, he met the female lead who had returned to the country, and the two of them had a relapse. In the end, the female lead died.
It's just a story, if anyone knows, please tell me, thank you, thank you
The icy beauty downstairs is not the answer. It's not this book
There was another scene that I remember. It was the day they were on the grass. The male lead first put his hand into the female lead's clothes. At first, the male lead hesitated for a long time. Then, when his hand covered the female lead's chest, the female lead took a deep breath, and the male lead sighed.
Half of the book is about their school life, and the other half is about the life of the male lead after the female lead leaves
Both of them downstairs were wrong! The plot I mentioned above has never appeared in the book you mentioned!

Answer 1

The novel was called The Game Master. It was a web novel written by Butterfly Blue. It told the story of a gaming expert who unexpectedly retired and returned to the game world to fight fiercely with other experts. The novel was published as a manga and a TV series.