Release date: 2013/05/02

Cut-in images are separated. Event and cut-in images are composed from extracted data, which may give more or less images than what is actually in the game, although I tried checking in-game whether or not certain combinations are possible.

dlsite
https://www.dlsite.com/maniax/work/=/product_id/RJ112126.html

Base +20

So it's not Yuki. Instead it's some random nobody. Shame as I would have bought it if it at least had the incest angle as a selling point.

Base +6