Touhou is a series of games made by a fan game club (it is said that there is only one person in the club).
You only need to understand the meaning of fan animation to know what the word fan means. For example, if someone draws a short comic, a four-frame comic, based on the relationship between the characters in a certain animation, then this comic is called a fan comic. It is a second creation. The same goes for animation... Touhou itself is a fan game, but the characters are not from other ACG works. Why do you still call this a fan? Personally, I think: Because the characters in Touhou all have prototypes, ranging from history to legends, the background music is adapted from certain songs. Therefore, the author lists Dongfang as a fan game
The characters appearing in the fan animation are literal characters. The characters appearing in the fan animation are the characters in the game.
"Where do they live?" "The background of the events in the game" "How do people live there?" "How many races are there?" "Who is related to whom?" "They solve it The question is what method to use." It can be regarded as a point in the world view, and it can also be regarded as a setting.
The world view given by the author, the relationship between characters, and the characters' personalities are not full. He gave the framework, and we were responsible for the rendering. Exaggerate the character's personality and come up with various pairings to deepen the relationship between the characters. Of course this is not official. Find out for yourself what fun it is.
PS: Everyone has their own Fantasyland in their hearts. Please don’t mind too much about the CP and painting style of the works created twice. Although it may not be to your taste, this is the author’s love for Gensokyo and CP.