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Iku Iku ♡ Succubus Saikyouiku: Rakudai Inma no Koukan Ryuugaku Nisshi
イクイク♡サキュバス再教育～落第淫魔の交姦留学日誌～
Busujima, a middle-aged teacher with an insatiable sexual appetite, is sexually harassed just for watching a female student at a club activity. He is summoned to the school principal's office for a lecture, but a mysterious door suddenly opens, and a young-looking girl with enormous breasts emerges, wearing practically nothing. Introducing herself as Lima, she reveals she is a centuries-old succubus who holds a high position in the Succubus Kingdom.
Lima tells Busujima he must become an instructor for failing succubus exchange students. After passing an aptitude test involving her erotic body, he is introduced to two virgin succubi who have failed their training. Busujima decides to teach them everything he knows, leading to a series of explicit lessons.
