Soushokukei na Succubus dakedo, Ecchi na Lesson shite kuremasu ka?

Kusaka Kouichi is a high-school student with an ero mangaka as his older sister. He lead a pretty ordinary life until summer vacation hit and he found out that his childhood friend, Mia was a succubus. Not only a succubus, she was inexperienced and would be in deep trouble if not trained. As time dr