Do 'Coffin Escape' three times. You will free your legs, but then she will tell you that doesn't work and start to rape you. You assume it's all over. One more box pops up, but it does not appear to give you any choices except die. However, there is a blank space in the box. Select the blank space and you win. The developer should be shot for this. It helps to have some adrenaline, morphine, energy drink, rations, etc. to keep your willpower and vitality up and lust down. The average person is not going to play this game because the developer has simply made it too difficult. OK, now I have to face Empuse. Great.