It's a mix. The core idea of the Happy Face Killer might have roots in reality, but the details and plot could have been embellished for the sake of the narrative.
A happy face was an adjective phrase used to describe a person's face that was filled with happiness. We can see that a happy face can be used to describe happiness in different situations. For example, in Qiu Cixuan's birthday celebration photo, she and her husband, Yu Xiaoguang, were happily photographed. Similarly, in the collection of sentences describing happiness on the face, there were also some sentences that described happy expressions. However, there was no information about the restaurants that would make Guangzhou locals happy after eating, so he could not give a specific answer.
The cast list of "Happy Face" included Xu Tian played by Dong Zijian, Zhang Jiayi played by Zhang Yi, Yu Yixiu played by Zhang Luyi, Old Sun played by Liao Fan, Dao Meilan played by Tong Liya, and other main characters. Other actors included Tao Tao, played by Tian Yu, Yu Zhou, played by Wu Xiaoliang, Jia Ruolan, played by Qiu Tian, Yang Zhi, played by Ren Min, Cui Ping, played by Lou Yixiao, Liu Shu, played by Lian Yiming, Hulan, played by Xu Juncong, and Liu Tiaoer, played by Su Xiaotong. These actors played different roles in the TV series "Happy Face" and presented the development of the plot together.
Team Happy's Mo Fan was known as the God Killer. He was a scavenger, famous for his superb skills and his lone wolf style. After joining Team Happy, he had displayed outstanding performance, especially in the group arena, becoming the team's main player. Mo Fan's win rate was not bad in the tenth season. He was usually quiet and expressionless, rarely interacting with others, but he was more accepting of Su Mucheng. After being killed countless times by Ye Xiu and the others, Mo Fan had no choice but to join Team Happy. As for why he was called the God Killer, it was because he had defeated Sun Xiang and Huang Shaotian.
While waiting for the anime, you can also click on the link below to read the classic original work of " Full-time Expert "!
The 'boy with a happy face story' could be about a boy who lives in a small village. He always has a happy face despite the hardships in life. One day, he discovers a beautiful meadow full of wildflowers near his village. He spends his days there, feeling the beauty of nature, and that's why he always has a happy face. He shares this place with the other children in the village, spreading his happiness.
I'm not sure specifically as I haven't read it. But generally, a graphic novel with 'happy face' in the title might be about positive experiences, happy characters, or stories that end on a cheerful note.