Sister Camp!

A little sister who acts tough and bossy around her older brother, but is weak and overly shy around strangers, barely able to speak.
To help overcome her social anxiety, she goes on a camping trip with her big brother during a long vacation.
Through physical affection with her brother and encounters at the campsites, let’s help her get over her extreme shyness.
While she’s initially hesitant about erotic encounters, the more she overcomes her shyness, the more receptive she becomes. She naturally has a “mesugaki” (bratty) streak, so once she gets comfortable…
While there is music inside the vehicle, the campsites feature only ambient natural sounds—like chirping insects, ocean waves, and crackling bonfires. Great care has been taken to emphasize the atmosphere.