During Yuzu's daily routine of stalking through her sister, Akane's trash, Guri suddenly appears and the two girls begin taking love consultations at school. Seiji and Akane reluctantly agree to help look for coupling candidates and soon the group thinks they have found a pair of ideal targets. However, things get much more complicated when no one can agree if the intended couple really share each other's feelings. In the midst of all this Yuzu and Guri scheme an elaborate plan to prove their instincts are right.
We know it's mutual, yet we 
can't write their names down.
Wir können trotzdem ihre
Namen nicht reinkritzeln.
Aunque es amor,
no podemos escribir sus nombres.
Es amor, pero
no escribiremos sus nombres.
Ils s’aiment et on n’a rien écrit,
c’est nul.
Anche se è amore reciproco,
non possiamo scrivere i loro nomi.
Mesmo sabendo que é mútuo, 
não dá pra escrever os nomes...
Они любят друг друга,
но их нельзя записать...