The fourth installment in the lesbian training adult series. This time, the small-breasted lesbian "B-Cup Junko" sets her sights on seducing and training an adorable big-titted girl. Her target is Ayaka-chan, a 19-year-old café worker with G-cup breasts who lost her virginity to a man at age 13—quite the early bloomer. Though she has prior lesbian experience, she dives headfirst into uncharted territory with full-on lesbian training play, depicted in raw, explicit detail. The film's appeal lies in the dramatic interplay between Junko's passionate, relentless training techniques and Ayaka-chan's evolving reactions.