Ruisa, an instructor on assignment, finds herself at the Satomi residence one day. Sensing something amiss in Satomi's unsettling demeanor, she quickly realizes something is off. As usual, she tries to inflate the lesson fee and make her exit, but... She's manipulated by hypnosis, transformed into a vulgar, ass-obsessed instructor under Satomi's control. Even as she drools uncontrollably, she's turned into a perverted sex instructor, relentlessly pursuing a 60-minute marathon of squirting orgasms...