Karen has been working part-time at a convenience store for a month to save up for her graduation trip. When Ai first met Karen, who had a lovely smile, he fell in love with Karen at first sight and became crazy about her. However, Karen had a boyfriend, and Ai was tormented by his unrequited love... One day, Ai noticed that Karen was feeling down, and offered to help her... The two were drunk and excited, but when they touched each other's skin and shared a passionate kiss, the emotions that had been dammed up began to overflow and they began to desire each other...