Hmm been trying to find a good example of this but no luck so far.
It is an anime and manga trope where people get some kind of trouble then split second later they split apart and sit Seiza like nothing is wrong while being nervous. Like if there was a Crash-Into Hello
which ended up in a rather close moment then they realize it and bam split apart and sit Seiza. Or it someone walks in on a private moment then assume the position.
There are many examples in Love Hina
I just gotta find a good one.
It would be comparable to when people whistle while hiding something in western works.