To find proof as to whether he is "in love" or not, Yukimura pats Himuro on the head from point-blank range. Seeing this, Ibarada, an upperclassman in the Ikeda Lab, talks about the need for a control experiment. In other words, in order to prove that the racing of his heart is because of Himuro specifically and not just because he's facing a woman, Yukimura has to pat Kanade and Ibarada on the head too. Himuro, on the other hand, sets out to prove that food made with love tastes better and cooks, but...
This is the first time I've 
seen them use the kitchen.
.إنها أوّل مرّة أراهم يستخدمون المطبخ
Das ist das erste Mal, dass ich sehe,
wie sie die Küche nutzen.
Es la primera vez
que los veo usar la cocina.
Es la primera vez
que los veo usar la cocina.
C’est la première fois
que je les vois cuisiner.
È la prima volta che li vedo usare la cucina.
É a primeira vez que vejo
um senpai usar a cozinha.
Я впервые вижу, что они 
что-то делают на кухне.