Ikuiku Succubus Saikyouiku

Steeped in samurai traditions and now entrenched in academia, Tanehisa Busujima is a strict, principled, and completely no-nonsense middle-aged university professor when it comes to education. So naturally, the universe decides to test him by assigning two succubus exchange students from a literal Succubus Kingdom. Ico Bicorn and Ruk Orcus have flunked their exams, couldn't care less about human culture, and have zero interest in sitting through lectures. Their study abroad director, Lima Grimalkin, expects Busujima to somehow rehabilitate them into functioning students. He fully intends to, because quitting isn't in his vocabulary. This is a 2025 OVA adapted from a visual novel by Ryuu M's, and it leans hard into its hentai genre while wrapping it around a surprisingly specific premise — a stubborn teacher versus equally stubborn succubi, each side refusing to back down. The fantasy-meets-mundane-academia setup gives it a bit of comedic tension beneath the adult content, with distinct succubus clan designs adding some visual variety to the cast. If you've watched something like Interspecies Reviewers and appreciated the unapologetic fantasy-world adult humor, this hits a similar wavelength. Fans of Welcome to Succubus High or the monster-girl dynamics in Good Luck! Ninomiya-kun will recognize the template here, though this one commits fully to the explicit side without pretending otherwise. It's a niche pick, but it knows exactly what it is and doesn't waste time getting there.