Ikki's younger sister Shizuku, whom he had not seen in four years, arrives at Hagun Academy as a new student. In class, Ikki and Stella learn about the selection match for the Seven Star Sword Art Festival from their teacher, Yuri Oriki. Afterwards, they meet Shizuku, who surprises them by kissing Ikki directly on the mouth, leading to a duel between Stella and Shizuku over the former's relationship with Ikki...