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...
In short, when a suspicious salesman wants 
to go to 100 places to push his wares,
باختصار، عندما يرغب بائع غامض الذهاب
 .إلى مائة بيت لبيع سلعه
Wenn ein Händler an 100 Orten
seine Waren veräußern will,
Problema del vendedor viajero
Problema del vendedor viajero
Pour écouler sa marchandise,
In poche parole, un venditore sospetto
vuole andare in cento posti per vendere la sua merce,
Em resurso, se um caixeiro suspeito
quer ir a cem lugares,
Когда подозрительный торговец хочет 
объехать 100 мест, чтобы сбыть товары,