a girl school friend who secretly masturbates next to sex

A female schoolgirl and her friend. After school, it is time to realize that you are playing together with everyone, and the tiredness of studying and club activities comes out suddenly. "Let's have a nap," everyone says, sleeping in the form of a river. what's wrong with the next couple of friends? A couple secretly starting sex with their friends thinking they're sleeping and a friend who secretly masturbates them to Okaz. They enjoy each other's thrills and get excited. This is a story about the sex experience of young people who are secretive to each other.