Ito and Shiraishi come across an embarrassing picture on Miyamura's phone. Ito suspects that he is a double agent. Yamazaki reveals that he will select his successor by whoever can bring him the seventh witch. Yamada and Shiraishi try a body swap to get information from Miyamura but it does not work as he can easily see through it. Miyamura later reveals the truth behind his participation in the club: his sister Leona had her memories erased by the seventh witch, who happens to be a girl that Shiriashi encounters Rika Saionji. Rika explains that she and Leona used to be friends and discovered the notebooks concerning the witches, but when she kisses Leona, she makes her forget. She agrees to help the club, and reveals the ripped page from the volume. Yamada and the gang learn that there is a ritual when all seven witches are gathered, but the data is in the final volume, which is mysteriously delivered to their club, swiped from the president's desk.