Ruri is the only one who has been captured by the ninja Yanagi. As punishment, she was tied up and given only water, but unlike usual, she felt that Yanagi was serious...Although she tried to break free of the rope, Ruri was reaching her mental and physical limits one day when she was drinking water, and Ruri opened her mouth and was given Yanagi's hot cock... !?
What awaits her is hope or despair, as she continues to fall into pleasure and climax non-stop!