Two coworkers get so drunk so they get into a weird ass masturbation contest. One of the guys has an inferiority complex over the other guy who only happens to be having a drink at his house because he's a friend of a friend of a friend so they ain't close to begin with but the other dudes had to leave because of various emergencies.
Nothing much going on plot-wise but really smutty sex scenes so that's what I'm crediting it to.
Gachiiki Chouhatsu Night