Hi there !
I saw in the raw version of chapter #81, page 15, 1st panel a small message.
"Think... the... and take... initial..." I can't decipher more.
We can also see the number #6 and #7 in the last panel of the same page.
In the alphabet, F is the 6th letter and G the 7th. A link to "MFG" ?
I was wondering if it was part of a secret code or something like that. Do you guys have seen other kind of hidden messages ?