Their parents are away overnight on a hot spring trip that they won in a lottery! Meisa, who adores her big brother, shakes her voluptuous F-cup breasts and does all sorts of naughty things! Her big brother also plays with Meisa's body and breasts to his heart's content! Meisa loves her big brother! "Big brother, play with Meisa in lots of naughty ways today! I love you, big brother!"