There was a girl named Ai-chan at the supermarket in front of the station where I worked part-time, a timid guy like me. She was a student at a university in the prefecture, and was a hardworking girl who managed to pay her rent and tuition fees through her part-time job without relying on money from her parents. I secretly liked Ai-chan, and I think we were probably in a mutual relationship. But then one day, I was seen by Takemaru-senpai, the most notorious delinquent in the prefecture, while we were alone together...!