The last high-grade story of the Heisei era is a sci-fi story that is faithful to requests! It's an all-out war with the high-grade aliens, set in the High-grade Alien Countermeasure Headquarters! Ray guns hit targets, high-grade squirting with fixed vibrators, high-grade clamshell sex and high-grade double-headed vibrators. The high-grade cutter that removes brainwashing also appears for the first time in a long time! ? High-grade with a crab-legged pose and a back and forth movement of the hips! High-grade!