Kazuma and Shinji have been best friends since high school, and Kazuma is going to introduce his fiancee, Sarina, to Shinji. Kazuma is happy for his friend’s happiness, but he witnesses Sarina dating a sugar baby. For the sake of his best friend, Kazuma confronts Sarina, but Sarina seduces him to keep quiet. Although he feels bad for his best friend, he is hooked on Sarina’s slender body and big breasts, and ends up training her to be a human toilet masturbator. The dangerous taste of honey is densely intertwined…