As Mato prepares to go to training camp with her 篮球 club, Yomi starts to become jealous of Mato's childhood friend, Yuu Kotari. Mato has 更多 dreams involving Black 金牌 Saw during camp, and at the same time, Saya takes an interest in Yomi. Upon returning to school, the 篮球 coach, Arata Kohata, discovers a 爱情 letter she wrote for a boy she liked had been 发布 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 由 Saya. In the other world, Black Rock Shooter attacks Black 金牌 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.