One day, a gifted graduate student in Saitama University's science department, Himuro Ayame, confesses her feelings to Yukimura Shinya. However, as neither of them have any experience with romance, they are worried as to whether it truly is love or not. They decide to discover "the standard conditions of love" so that they can judge each other's feelings by them. Even as their underclassman in the lab, Kanade, throws up her hands in exasperation, Yukimura and Himuro attempt to quantitatively measure "thrilling palpitations of love" by taking their heart rates while performing actions such as "kabedon," "chin-lift," and "sleeve-roll," but...
"But there could be a rainbow crow out 
there and you just didn't find it,"
لكن يمكن أن يتواجد غراب متعدّد الألوان" 
"لكنك غير قادر على إيجاده
„Aber es könnte doch eine Regenbogenkrähe geben,
die du nur nicht gefunden hast“,
"Pero podría haber un cuervo arcoíris
que no encontraste".
"Pero podría haber un cuervo arcoíris
que no encontraste".
Un rabat-joie pourrait te sortir
"Ma potrebbe esserci un corvo arcobaleno
da qualche parte, è solo che non l'hai trovato"
"Mas pode ser que exista um cor de arco-iris,
você só não encontrou ainda",
«Но ведь где-то может быть и радужный 
ворон, просто вы его не нашли», —