Ep. 3: The Mitama Sisters' Mysterious Phenomenon While Manami Is Away
Aired on July 23, 2017

Himeno introduces her young cousin, Shino-chan, while Manami reveals she has three triplet sisters and a younger fourth sister. Manami instructs the triplets to remain at home and supervise their youngest sibling during her absence. This arrangement leaves the four youngest Mitama sisters alone together. Consequently, they encounter a truly mysterious phenomenon that puzzles them. The narrative focuses on the interactions and experiences of these younger family members while their older sister is out. The story highlights the unique dynamics within the Mitama family and the unexpected events that arise from the sisters being left in charge of the youngest member.
Episodes
- Ep. 1 · The school play preparations conclude with unexpected results during the performance.
- Ep. 2 · Himeno's Magazine Feature and the Merfolk School Exchange Program
- Ep. 3 · The Mitama Sisters' Mysterious Phenomenon While Manami Is Away
- Ep. 4 · Confusion Over Love Letters and Distinguishing People by Beliefs in UMAs and UFOs
- Ep. 5 · Quetzalcoatl Sassassul transfers to the school, revealing mysterious Antarcticans and Himeno's past trauma.
- Ep. 6 · Himeno, Kyouko, and Manami explore their families' histories and careers
- Ep. 7 · Manami and her sisters enjoy a pool day while Suu-chan faces her first swimming experience.