Himeno's class rehearses a play for the school fair, but controversy surrounds Nozomi's casting; Nozomi and Kyouko want to see how fast Himeno can run.

Nozomi agrees to try on Mitsuyo and Inukai's fashions after Himeno appears in a fashion magazine; Himeno and her friends recall a time when their class visited a school for merfolk.

Manami needs to go out, so she asks her triplet sisters to watch their youngest sibling. The triplets are unprepared for the mysterious phenomenon that they encounter while babysitting.

Himeno feels insecure about her body after receiving a love letter, so her friends try to put her at ease; After Nozomi sees a UFO while studying for exams, a new student suddenly appears at school.

New student Sassassul's serpentine nature makes Himeno nervous because of a scary movie; Sassassul addresses misconceptions the class has about Antarcticans.

Himeno explains her family's origins to her friends; Kyouko works for her artist father while Manami handles a box said to be cursed.