Mou Yurushite! Shasei Kanri Oneesan  

もう許してッ!射精管理お姉さん

An adult woman's strict control shapes a young boy's sexual urges into submission. He pleads for her to relieve his sore balls, but she refuses. Eventually, he is rewarded with an intense orgasm that lasts for a week. However, this pleasure is short-lived as another punishment follows just twelve minutes later.