悦楽剤 ～人妻は媚薬で母乳を垂れ流す～

The story follows a young college student who works as a private tutor for the Kusunoki family. During his visits, he develops an attraction to Makie, his student's mother, due to her voluptuous figure. He also faces challenges with his student, who displays a hostile attitude toward him.

One day, while browsing the internet, the protagonist comes across an advertisement for a supposed "love potion" that promises to change his nightlife. Despite his misgivings, he decides to purchase it, triggering a series of events that explore themes of desire, temptation, and the consequences of his choices.