"It's just a promise to dress up, right?" The gentle, beautiful girl reluctantly practices sex to appease her brother, who suffers from social anxiety. Overly aroused and overstimulated, the teenage girl is conquered by anxiety, and a huge, unprotected penis penetrates her, resulting in 20 ejaculations. (Chikawa Eien MIAB-403)

One day, Chikawa witnessed her brother masturbating. She tried her best to stop him, but he begged her to let him practice sex, as long as they didn't kiss. Chikawa reluctantly agreed. However, her brother's demands started with bare buttocks and escalated to unprotected penetration, their forbidden sex causing Chikawa to experience uncontrollable orgasms!