it is simply common courtesy to clean up after yourself; a bird does not foul the nest it is about to leave; on leaving a place, one should see that all is in good orderprísloviepozri aj 跡を濁す【あとをにごす】 a 立つ鳥跡を濁さず
it is simply common courtesy to clean up after yourself; a bird does not foul the nest it is about to leave; on leaving a place, one should see that all is in good orderprísloviepozri aj 跡を濁す【あとをにごす】 a 立つ鳥跡を濁さず
Lingaku