A regular customer cancels their order. Nagomu's father, Irino Heigo, is furious with him, thinking that Nagomu has done something again. Heigo and Nagomu go to apologize to their regular customer. There they find out that the cancellation was actually connected to someone else who works at Ryokushou, Seto Saki.
In that case, the fact that 
you wrote that letter...
...في هذه الحالة، حقيقة كتابتك تلك الرّسالة
Dann wäre dieser Brief,
den du geschrieben hast,
Pues dado que tú escribiste esa carta,
En ese caso,
como tú has escrito esa carta,
Ça veut dire
que pour écrire cette lettre,
Se è per questo, anche per riuscire
a scrivere quella lettera
Se é assim, então só deu
pra escrever aquela carta,
Значит, и письмо вы смогли написать,