Botan and Yasuzu in captivity are buckled up and further molested.

At midnight, in an underground prison of the mansion.
Despite the physical restraints, they secretly prepare a plan for a comeback.
They think that he must have a drug that controls the Aura of an Ogre because
the merchant controls Demi-Ogres, thus they break out of the prison and sneak
into a room where the drug is hidden. Upon getting the drug, Demi-Ogres appear
in front of them. In fact, the merchant knew their scheme and has set a trap.

Based on “Kunoichi Botan” hentai RPG