My girlfriend is a bit of a wallflower, but she has big tits, and her shy demeanor makes her easy to get along with. We're both otaku, so we live a happy, secluded life together. One day, a friend who's also an otaku came to visit. He's apparently a massage therapist at a spa. We're a couple who usually just sit around playing games, so we decided to give him a try. Her reaction to being touched by another man was a little off... Could it be that she's feeling something from the massage?