Karen worked part-time at a convenience store for a month to cover her graduation trip. Aoi fell in love with Karen at first sight when he first encountered her lovely smile. However, Karen had a boyfriend, and Aoi spent days feeling disappointed due to his unrequited love... One day, Aoi realized that Karen was not feeling well and asked her if she wanted to become stronger... and drunk. As they both kissed each other's skin without letting their excitement cool down, the feelings they had suppressed overflowed, and they sought each other out...