During the B.O.B. in GGO, Sinon realized that she had fallen for the Black Swordsman, Kirito. But, once she met him IRL she learned that he had already swore his heart and love to another girl, Asuna. After the funeral of Yuuki, a new threat in the VR world opens the door for a new relationship in Kirito's heart. Kirito x Sinon, Kirito x Asuna, Lemon warning! Light Novel spoilers!