Konya mo, Ecchi na Shiiku wa Chika no Shoko de…

Sayo is a girl with zero experience when it comes to love. She ends up as the pet to a young man named Shuya who is the son and heir to one of Japan's leading financial corporations. In his house, there is a large book archive, and it is there that she has new forms of pleasure instilled in her day after day.

(Source: Manga Reborn)