Today is a day when the members of the Ikeda lab gather to announce research results. When Kosuke cites Aika as an excuse for not having read the papers he was supposed to, Professor Ikeda's muscles expand and he crushes a pen to smithereens. On the other hand, Yukimura and Himuro give a joint presentation of the results from the date they went on. As they present the records stating in which situation their highest recorded heart rates were, writhing in distress with the embarrassment, Professor Ikeda's reaction is... On top of this, In order to increase the amount of experimental data, Yukimura and Kosuke, and Ibarada and Kosuke, form pairs to measure data on their vitals...
From the six of us, it is possible to 
make 15 combinations of groups of two.
من بيننا نحن الستّة، من الممكن عمل 15 تركيبة 
.من المجموعات المكوّنة من شخصين
Mit uns sechs erhält man bereits
15 mögliche Kombinationen an Pärchen.
Entre seis es posible crear
15 combinaciones de grupos de dos.
Entre seis es posible crear
15 combinaciones de grupos de dos.
Avec toutes les combinaisons,
nous avons 15 couples différents.
Partendo da noi sei, 
è possibile formare quindici gruppi da due.
De nós seis, podemos fazer até
15 combinações de duplas.
Из шести присутствующих можно 
сформировать 15 разных пар.