Touhou Chireikiden ~ Hansoku Tantei Satori - Vol. 1 Ch. 1 - The SDM Case Goes Under the Ground (Pt. I)

[Silfir]

@WineWeed
It has been canon since at least 2006.
https://en.touhouwiki.net/wiki/Perfect_Memento_in_Strict_Sense/Hong_Meiling

 

[vangoz]

Bit different art style than the ones we're used to.

 

[Angris]

So basically the butler did it.

 

[Kurbo]

You've heard of a hat for your head, now how about a hat for your wings?

 

[Superpou]

"Scarlet Devil Mansion A Mansion where vampires dwell" yeah you mean like two, one of them being in the basement.