English ain't my mother language, so there might be weird wording and other translation problems, sorry.
General information about this doujin: https://www.melonbooks.co.jp/detail/detail.php?product_id=469423#&gid=null&pid=1
This doujin is not available for purchase anymore, BUT the author released a compilation book that includes this and other 5 JunNana stories: https://www.melonbooks.co.jp/detail/detail.php?product_id=1091672
It's an amazing compilation, highly recommended, and definitely worth the price!