Touhou Suimusou: Immaterial and Missing Power

Touhou Suimusou: Immaterial and Missing Power is the 7.5th installment of the Touhou project by Team Shanghai Alice's sole member ZUN in collaboration with Twilight Frontier. It is called "7.5" because the events take place chronologically between Perfect Cherry Blossom (TH07) and Imperishable Night (TH08). It was developed together with Imperishable Night and published on the following Comiket 67.