When Himuro finds out that her junior in the Ikeda lab, Kosuke, has spent over 220 thousand yen on his beloved Aika and holds her every night when he goes to sleep, she is shaken by the realization that the only present she's ever given Yukimura is a notebook, and that she's never held him while she slept. She worries that she can't objectively call what she feels "love." As Yukimura and Himuro endlessly debate "love" using numbers, Kanade proposes that the two of them go on a date, but...
Is there really any need 
to be that efficient?
هل من الضروريّ أن يكون الأمر فعّالًا لتلك الدرجة؟
Muss das überhaupt
so effizient gestaltet sein?
¿Es necesario ser tan eficientes?
¿Es necesario ser tan eficientes?
Ça vaut vraiment la peine
de se creuser autant la cervelle ?
C'è davvero bisogno di essere così scrupolosi?
Precisa ser tão eficiente assim?
Зачем вам нужен 
настолько эффективный маршрут?