Joshidaisei Kateikyoushi Hamanaka Ai

From Fateful Encounters: Kokubo Masahiko is normal Junior High School student, but because of his bad grades he gets a home tutor known by the name of Hamanaka Ai. With help from her senpai Nakamura Ryoko, she goes about her days being a home tutor to a young boy bringing perversion and misunderstandings along with it.