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...
It's totally obvious that the kid 
has to have been Yukimura-senpai!
من الواضح جدّا بأنّ ذلك الفتى لا بدّ
 !أن يكون يوكيمورا-سينباي
Ist doch ziemlich offensichtlich,
dass der Kleine von damals Yukimura war.
¡Es completamente obvio
que ese era Yukimura!
¡Si es obvio que era Yukimura!
c’est évident que c’était Yukimura !
È chiaro come il sole che
quel bambino era Yukimura-senpai!
É óbvio que esse moleque
era o Yukimura-senpai!
Очевидно же, что тем мальчиком 
и был Юкимура!