The sextuplets catch a cold and the brothers confront Todomatsu about never telling them anything.
We really don't know anything 
about each other, do we?
.يبدو أنّنا لا نعرف شيئًا عن بعضنا البعض
Wir wissen wohl scheinbar
gar nichts über die anderen.
On ignore tout
des uns et des autres.
A quanto pare non ci conosciamo affatto.
Parece que não sabemos
nada um do outro.