This is a cover of "Nyuugyuuki". The content is copulation of Gozu (Cow's devil) and the boy. The content of the couple who has the physique difference seems to be my recent fashion.

「乳牛鬼」の表紙。内容は牛頭鬼と少年の交尾です。体格差のあるキャラクターノ絡みが最近の個人流行か。