Saimin Ryoujoku Gakuen - Episode 2

A school doctor learned how to hypnotize people with smoke. And, of course, he began to use it to his advantage. The first one was a cute little schoolgirl who came to talk to him. Then her friends came to him, and in the end, he organized a mass orgy with 3 girlfriends and guys from different clubs. In later episodes, he continues to hypnotize the students and their mothers as well. The teachers also got to participate in the act. It all comes down to huge orgies involving all the students, teachers, and mothers.