[SFM] Futal Error

And Oba, as usual, was playing a new computer game after class. Nika was rereading another issue of cosmopolitan. Suddenly, the computer stopped responding and the screen displayed an inscription that the computer was hacked and now henshin will be made in futanari. Nika and Both became participants in a certain futanari game and have to fuck each other until all the "achievements"are completed...