Saya tells Shinichirō about the Elder Bairns and he offers to help. Returning home, Saya finds Tadoyoshi collapsed from an apparent fainting fit. The dog again confronts Saya, asking what would happen if she broke her promise. As she suffers another headache, she remembers the promise came with a reward and a punishment attached. After a few days without Elder Bairn attacks, Saya returns to school. As she walks with Yūka to class, a Spider Elder Bairn appears and attacks the students. With no escape available, Saya is forced to unsheathe her sword in front of her friends.