The first semester has come to a close, and the Ikeda lab is having a party where everyone's bringing what they like to eat and drink. They're having fun, playing games like the "prime number Yamanote line game," when a drunken Himruo finally does a certain something with Yukimura... And even Kanade ends up drunk... On the other hand, the mood quantifier obtained through the previous round-robin kiss experiment has progressed their research tremendously, and in order to gather more data, Yukimura and the others use fairy tales such as "Snow White," "Kaguya-hime," and "The Crane Returns a Favor" as references, but...
Clean every nook and cranny, 
until no speck of dust remains.
.نظّفي كلّ جزءٍ منه حتى لا تبقى ذرّة غبار واحدة
Keine Ecke, keinen Winkel sollst du übersehen.
Kein Körnchen Staub will ich mehr sehen.
Limpia cada rincón
hasta que no quede polvo.
Limpia cada rincón
hasta que no quede polvo.
Je ne veux pas voir
un grain de poussière en rentrant !
Spazza bene ogni angolo e ogni fessura,
non deve rimanere neanche un granello di polvere.
Limpe todos os cantos,
sem deixar nenhum pó.
Чтобы нигде ни одной пылинки 
не осталось.