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...
Haven't you heard of the 
sphere packing problem?
ألم تسمع عن مشكلة تعبئة المجال الكرويّ؟
Kennst du nicht das Problem
der dichtesten Kugelpackung?
¿Conoces el empaquetamiento de esferas?
¿Conoces el empaquetamiento de esferas?
Le problème d’empilement compact,
ça te parle ?
Non hai presente il problema dell'impacchettamento di sfere?
Esqueceu o problema do
empacotamento de esferas?
Слышал про плотную упаковку 
равных сфер?