It is the same as nadu except the thighs are closed modestly together.  Sometimes wrists are crossed in front as though for binding.

This variation is typically reserved for new or white silk slaves or slaves who serve their owner in a non-sexual way. The Tower position is also used by all slaves serving drinks to a Freeperson of the same gender as themselves,except by silk slaves who are also kajirus. white-silk slave girls, Free Women including those in temporary service to pay a debt, or slave girls who serve their Master in a nonsexual way. Some Masters may ask their slave to serve others from this position.