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...
I began growing more conscious of you after 
you appeared in a dream on April 12th.
أصبحت أكثر إدراكًا لوجودك بعدما ظهرت 
.في أحد أحلامي ليلة 12 من أبريل
Ich dachte bewusster an dich, nachdem du in einem
meiner Träume am 12. April aufgetaucht warst.
Empecé a ser más consciente de ti cuando
apareciste en un sueño el 12 de abril.
Empecé a hacerte más caso cuando
apareciste en un sueño el 12 de abril.
Le premier incident
remonte au 12 avril,
Ho iniziato a essere più consapevole di te
dopo averti sognato il 12 aprile.
Eu comecei a notá-lo conscientemente depois
de você aparecer num sonho, em 12 de abril.
Я стала больше думать о тебе после того,
как увидела во сне двенадцатого апреля.