Well, without more details about the story and its origin, it's impossible to know if it's true. Maybe it's a blend of real and fictional elements to make it more compelling.
It could be a drama. Given that it's about the last thing someone did, there's likely to be a lot of emotional content which is typical of the drama genre.
You might enjoy 'Slaughterhouse-Five'. It combines satire and wit in a way that makes you think and laugh at the same time. The non-linear narrative adds to its charm and the writing is sharp and clever.
Of course, there's no problem with light novel resources. I'm happy to help you. You can tell me what kind of light novel resources you need, such as comics, novels, animations, etc. I will try my best to provide you with relevant information.
Loving You Is The Best Thing I've Ever Done was a TV series directed by Che Liangyi and starred by Zhang Linghe, Xu Ruohan, and Wang Youjun. The drama was adapted from Sheng Li's novel of the same name. It told the story of Shen Xifan, the manager of the hotel's guest room department, and He Suye, a traditional Chinese medicine doctor. The plot revolved around the doctor-patient relationship between the two of them. They gradually developed feelings for each other in their encounters and finally found each other's happiness. The drama started filming in 2024 and was aired in 2025.
One of the main themes could be secrecy. There are probably things that characters are hiding from each other, which adds to the mystery. Another theme might be love and how it can be complicated by all the unsaid things.