Mitsuki is a happy girl with a boyfriend, and Kokoro is a complicated girl with no sexual experience. They are completely different types of people, but they get along well enough to be best friends and live together. One day, out of Kokoro, Kokoro learns how to kiss from Mitsuki, and she suddenly awakens to lesbianism! She masturbates thinking of Mitsuki, attacks him while he sleeps, and comforts him with adult toys after he dumps her boyfriend... Before they know it, the two of them have mutual feelings, and they exchange saliva in a passionate kiss, rubbing their pussies together violently in a lesbian sex session!