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...
Researching a pillbug's tendency to switch 
directions when reacting to stimulus, I see.
دراسة ميول حشرات الأرماديلا في تغيير اتّجاهها
 .عند التعرّض لحافز. فهمت
Ah, du untersuchst die Reorientierungs-
Reaktionen von Asseln.
Investigas la tendencia de las chinches
a alternar direcciones por estímulo.
Investigas la tendencia de las chinches
a alternar direcciones por estímulo.
Tu étudies l’alternance directionnelle
chez les cloportes.
Stai studiando la tendenza dei porcellini di terra
a cambiare direzione quando reagiscono a uno stimolo, eh?
Pesquisa sobre tendências de mudança
de direção do tatu-bolinha, né?
Изучаешь изменение движения мокриц 
под влиянием раздражителей.