First, in "Roommates," Maika, Risa, and Ayaka were living together happily, but when they found out that Maika had a boyfriend, they decided to punish her out of anger and jealousy... They tied up Maika while she was deep asleep, and licked her nipples, and the erotic acts escalated. In "Older Sister and Younger Sister," we see the passionate feelings of a younger sister for her older sister. In "Senior Office Lady and Junior Office Lady," we bring you the story of two junior office ladies whose minds and bodies are toyed with by a senior office lady.