That JAV

Yuichi, the older brother, sees at first glance that his younger brother's girlfriend, Mai, is a dominatrix who likes to give him hardcore sex and plans to train her. He stares at Mai and treats her as gently as he can. One day, Mai spills tea on Yuichi and stains his pants. Yuichi makes her wipe his crotch with a prank command tone. Another day, when Mai comes to Yuichi to apologize again, he orders her to "rub his cock gently" in a mischievous tone.