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...
Now, the history of number 
theory begins to move again...
...والآن، تاريخ نظرية الأرقام يتواصل مجدّدًا
Nun kommt wieder Bewegung
in die Geschichte der Zahlentheorie …
Ahora, la historia de la teoría numérica
empieza a moverse de nuevo…
Ahora, la historia de la teoría numérica
empieza a moverse de nuevo…
L’histoire des mathématiques
Ora, la storia della teoria dei numeri
inizia a muoversi di nuovo...
Agora, a história da teoria dos números
dará um grande passo...
И теперь теория чисел развивается 
дальше...