セーラーこいしとゴスロリさとりによるによる ♪ Girls ♪ です。
The following is English explanation.
Title : [Touhou MMD R18] It is a ♪ Girls ♪ undressing version in a Komeiji sister.
It is ♪ Girls ♪ by Koishi of a sailor blouse and Satori of the GOSURORI clothes.
Still more, this English is a decodement by the translation software, we think that there is the part which the interpretation is difficult by probably but please pardon.