A new student, the Antarctican Quetzalcoatl Sassassul, suddenly transfers into the girls' school one day, much to the intrigue of everyone in the class. But for some reason, Himeno seems to have experienced some sort of childhood trauma involving Antarcticans. The new student is as kind and friendly as can be, but Himeno just can't shake her fear...

Meanwhile, everyone in the class has lots of questions for Sassassul...
Human 
Evolutionary Theory
البشر 
نظريّة التطور
Die Evolutionstheorie
des Menschen
Teoría de la Evolución Humana
Teoría de la Evolución Humana
THÉORIE
DE L’ÉVOLUTION HUMAINE
Teoria evolutiva
degli esseri umani
Teoria  da 
Evolução Humana
Эволюционная 
теория человечества