とある夏休みの膣内放尿練習日誌――僕の大好きな瀬尾さんを小便器として使用した28日間

About this work

This doujinshi from Hiyashimakura, titled "A Certain Summer Vacation's Vaginal Urination Practice Diary," explores themes of school uniforms and virginity. The narrative follows 28 days of a character using their beloved Seo as a urinal, focusing on oral sex and impregnation.