OVA Ikuiku Succubus Saikyouiku / Cum, cum ♡ Succubus: Diary of Re-education of Students Who Failed Exams by an Exchange Teacher

The main character of the hentai, Busujima Tanehisa, is captured by the succubus Lima Grimalkin. She offers him a job to re-educate some annoying succubi who repeatedly fail their final exam. The first succubi assigned to Busujima are Iko Bicorn and Ruku Orcus, who, although they look sexy, are extremely wild and don't know how to use their charm...