As Mato prepares to go to training camp with her basketball, basket-ball club, Yomi starts to become jealous of Mato's childhood friend, Yuu Kotari. Mato has plus dreams involving Black or Saw during camp, and at the same time, Saya takes an interest in Yomi. Upon returning to school, the basketball, basket-ball coach, Arata Kohata, discovers a l’amour letter she wrote for a boy she liked had been posté for all to see. Although she holds back tears in front of the crowd, she comes to realise those laughing behind her back when she is taunted par Saya. In the other world, Black Rock Shooter attacks Black or Saw's hideout, killing her minions, one of which resemble Arata. Simultaneously in the human word, Arata experiences a sudden pain in her head and falls unconscious in front of Mato.
