Am I the only one who caught that one random page that didn't belong?

Yeah! What manga was that from?

And, were there some missing pages too?

It's from this one:

http://www.mangago.zone/read-manga/hisho_wa_shachou_ni_kudokareru/mf/v01/c001/11/

I was like, okay that was random. Had to page back and forth to see it didn't belong there.

Arigatou!