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...
What? When you said you were in love, 
you were talking about that thing?
ماذا؟ عندما قلت بأنك واقع في الحبّ 
كنت تقضد ذاك الشيء؟
Was? Als du davon sprachst,
verliebt zu sein, meintest du dieses Ding?
¿Qué? Cuando hablabas
de amor, ¿era por eso?
Cuando hablabas
de amor, ¿te referías a esto?
C’est elle, la fille que tu aimes ?
Cosa? Quando hai detto di essere innamorato,
stavi parlando di quella cosa?
O quê? Essa é a mulher que você ama?
Что? Когда ты говорил о любви, 
имел в виду её?