Description
The older sister, who has no doubt about her younger brother's innocence, challenges him to a game! Although she insists that "it's not embarrassing to go to a hot spring together," the mission is so erotic that the younger brother ends up with a full erection! The older sister blushes! She ends up calming the younger brother's heat with a handjob. When she secretly takes a photo of the two of them crossing the line, thinking that no one is watching...