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...
I don't know what to do. I might not 
be in love with you, Yukimura-kun.
لا أعلم ما العمل. قد لا اكون واقعة في حبّك
.يا يوكيمورا-كن
Ich weiß weder ein noch aus.
Vielleicht liebe ich dich gar nicht, Yukimura.
No sé qué hacer.
Tal vez no te quiera, Yukimura.
No sé qué hacer.
Tal vez no te quiera, Yukimura.
Que faire ? Je crois bien
que je ne suis pas amoureuse.
Non so cosa fare.
Potrei non essere innamorata di te, Yukimura-kun.
Pode ser que eu não esteja
apaixonada por você.
Я не знаю, что делать. 
Возможно, я не влюблена в тебя, Юкимура.