After a month of dating his endlessly cheerful adult college girlfriend Umika Minamisawa, her boyfriend invites her over while his parents are away with only one thing in mind. Her bust already looked huge through her campus-style outfit, but seeing her naked H-cup breasts and tiny waist leaves him speechless. He massages, shakes, squeezes, and buries himself between them before receiving his first titjob and climaxing almost immediately. Then the couple have sex for the first time and spend their day affectionately exploring her spectacular curves instead of attending class.