Ochiru Hitozuma ~Animation~

Three years ago, Haruka's parents died in a car accident, leaving Haruki alone. Fortunately, Haruki was soon adopted by the Nagys family, but Haruka had a dark past, of which none of them know. As it turns out, Haruka's father was a highly trained prostitute coach in a group called "Under Eden." Before his death, Haruka's father introduced the boy to a local city institution called "Paradise." With the intention of following in the footsteps of his father, Haruki became friends with the owner of the establishment, and also got access to various medicines and other equipment for use at his discretion.
When Haruki begins to live with Nagisa's family, he pays attention to the beautiful wife of Sayoko, who is now his stepmother. Sayoko owns a small tea shop located on the lower floor of their three-story building. Her husband works in the company and he is often not at home, or on business trips. Sayoko has a son named Takashi, who studies in the same class as Haruka, they are friends, but Takashi does not know about Haruka's perverted interests. Over time, Haruki establishes a long-term plan by which he will pour an aphrodisiac into Sayoko tea for three years. In the meantime, he also feeds Sayoko's husband so that he is less interested in sex because of impotence.
Sayoko is not the only woman Harukhi has laid eyes on. In his school works a strict, but very attractive teacher Reiko Fuyuno, who is also a close friend of Sayoko. Reiko, however, is harder to pursue, because she was not narcotized, like Sayoko. Once Haruki pretends to be sick to stay at home. Using his manipulation skills, he transforms Sayoko's maternal feelings toward him into desire. With devilish young innocence, an unnaturally large cock, drugs and other utensils, and with the help of "Under Eden," Haruka begins her career as the youngest trainer of sexual degradation in the story "Under Eden." But he must be careful; Younger sister Reiko Ryoko, who works in the police, investigates the affairs of the group "Under Eden" and can potentially spoil everything ...