3화: 마나미가 없는 동안 미타마 자매들의 신비한 현상
2017년 7월 23일 방영
Himeno has a young cousin named Shino-chan. Manami, as well, has three young triplet sisters, and an even younger fourth sister. One day, Manami orders her triplet sisters to stay home and watch their youngest sister while she goes out. This leads the four youngest Mitama sisters to experience a truly mysterious phenomenon... (Source: Crunchyroll)