Kaori Manaka and Rio Tsukishima gather with a friend in a room to enjoy lunch together. They share takeout sushi, laughing and having a great time. When Kaori leaves for a university makeup class, Rio and the friend are left alone. They drink alcohol, grow close, and begin craving each other's bodies. They passionately entwine, confirming their feelings in intense lesbian lovemaking. Later, Kaori returns home, while the friend heads out to work. The time the three spent together remains a special, unforgettable memory.