Aoi, a childhood Aoi who had moved to Tokyo, came back home to visit me. We used to be good friends, but now she belittles me, saying, "You're probably still a virgin Aoi." Aoi received an aphrodisiac from her boyfriend in Tokyo, but she's too scared to use it, so she asked me to be her practice partner. When she took the potion, the aphrodisiac had too much effect... and she ended up having sex like an unstoppable monkey...