sample doujin found at https://www.pixiv.net/en/artworks/60579742
this is a sample of https://www.doujinshi.org/book/975308/
if you like it, please support the artist by buying the full version at http://www.toranoana.jp/mailorder/article/04/0030/49/28/040030492875.html and then support the fans by scanning and sharing it